diff --git a/services/mongodbflex/oas_commit b/services/mongodbflex/oas_commit
index 5c05d0ead..c2d5477e1 100644
--- a/services/mongodbflex/oas_commit
+++ b/services/mongodbflex/oas_commit
@@ -1 +1 @@
-58dbd39e05f1ddc2d44b191eb3476225130c4ded
+72f3b665150d5f27cb0acf9a30bf8645b1dcea9e
diff --git a/services/mongodbflex/v1api/client.go b/services/mongodbflex/v1api/client.go
index 94587858c..f035f334f 100644
--- a/services/mongodbflex/v1api/client.go
+++ b/services/mongodbflex/v1api/client.go
@@ -462,6 +462,15 @@ func (c *APIClient) decode(v interface{}, b []byte, contentType string) (err err
 		*s = string(b)
 		return nil
 	}
+	if r, ok := v.(*io.Reader); ok {
+		*r = bytes.NewReader(b)
+		return nil
+	}
+	// Must stay before the JSON branch: json.Unmarshal would base64-decode into *[]byte.
+	if p, ok := v.(*[]byte); ok {
+		*p = b
+		return nil
+	}
 	if f, ok := v.(*os.File); ok {
 		f, err = os.CreateTemp("", "HttpClientFile")
 		if err != nil {
diff --git a/services/mongodbflex/v1api/model_create_instance_payload.go b/services/mongodbflex/v1api/model_create_instance_payload.go
index 210fc474e..db730fd6d 100644
--- a/services/mongodbflex/v1api/model_create_instance_payload.go
+++ b/services/mongodbflex/v1api/model_create_instance_payload.go
@@ -26,7 +26,7 @@ type CreateInstancePayload struct {
 	FlavorId       string `json:"flavorId"`
 	// Labels field is not certain/clear
 	Labels               *map[string]string `json:"labels,omitempty"`
-	Name                 string             `json:"name" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1,61}[A-Za-z0-9_]$"`
+	Name                 string             `json:"name" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1\\,61}[A-Za-z0-9_]$"`
 	Options              map[string]string  `json:"options"`
 	Replicas             int32              `json:"replicas"`
 	Storage              Storage            `json:"storage"`
diff --git a/services/mongodbflex/v1api/model_create_user_payload.go b/services/mongodbflex/v1api/model_create_user_payload.go
index 3d48daa15..4bbef3f22 100644
--- a/services/mongodbflex/v1api/model_create_user_payload.go
+++ b/services/mongodbflex/v1api/model_create_user_payload.go
@@ -21,10 +21,10 @@ var _ MappedNullable = &CreateUserPayload{}
 
 // CreateUserPayload struct for CreateUserPayload
 type CreateUserPayload struct {
-	Database string `json:"database" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1,61}[A-Za-z0-9_]$"`
+	Database string `json:"database" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1\\,61}[A-Za-z0-9_]$"`
 	// The roles defined for a user. Currently only one role in the list is supported, therefore only the first role from this list is used. The *roles* attribute can contain the following values: 'read', 'readWrite', 'readAnyDatabase', 'readWriteAnyDatabase', 'stackitAdmin'. **The 'readAnyDatabase', 'readWriteAnyDatabase' and 'stackitAdmin' roles will always be created in the admin database.**
 	Roles                []string `json:"roles"`
-	Username             *string  `json:"username,omitempty" validate:"regexp=^[A-Za-z][A-Za-z0-9-]{1,61}[A-Za-z0-9]$"`
+	Username             *string  `json:"username,omitempty" validate:"regexp=^[A-Za-z][A-Za-z0-9-]{1\\,61}[A-Za-z0-9]$"`
 	AdditionalProperties map[string]interface{}
 }
 
diff --git a/services/mongodbflex/v1api/model_instance_response_user.go b/services/mongodbflex/v1api/model_instance_response_user.go
index d73093392..74897eab2 100644
--- a/services/mongodbflex/v1api/model_instance_response_user.go
+++ b/services/mongodbflex/v1api/model_instance_response_user.go
@@ -20,7 +20,7 @@ var _ MappedNullable = &InstanceResponseUser{}
 
 // InstanceResponseUser struct for InstanceResponseUser
 type InstanceResponseUser struct {
-	Database *string `json:"database,omitempty" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1,61}[A-Za-z0-9_]$"`
+	Database *string `json:"database,omitempty" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1\\,61}[A-Za-z0-9_]$"`
 	Host     *string `json:"host,omitempty"`
 	Id       *string `json:"id,omitempty"`
 	Port     *int32  `json:"port,omitempty"`
diff --git a/services/mongodbflex/v1api/model_partial_update_instance_payload.go b/services/mongodbflex/v1api/model_partial_update_instance_payload.go
index 85385f2b5..cab4cc042 100644
--- a/services/mongodbflex/v1api/model_partial_update_instance_payload.go
+++ b/services/mongodbflex/v1api/model_partial_update_instance_payload.go
@@ -25,7 +25,7 @@ type PartialUpdateInstancePayload struct {
 	FlavorId       *string `json:"flavorId,omitempty"`
 	// Labels field is not certain/clear
 	Labels               *map[string]string `json:"labels,omitempty"`
-	Name                 *string            `json:"name,omitempty" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1,61}[A-Za-z0-9_]$"`
+	Name                 *string            `json:"name,omitempty" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1\\,61}[A-Za-z0-9_]$"`
 	Options              *map[string]string `json:"options,omitempty"`
 	Replicas             *int32             `json:"replicas,omitempty"`
 	Storage              *Storage           `json:"storage,omitempty"`
diff --git a/services/mongodbflex/v1api/model_update_instance_payload.go b/services/mongodbflex/v1api/model_update_instance_payload.go
index 8f8dab394..ffac1f282 100644
--- a/services/mongodbflex/v1api/model_update_instance_payload.go
+++ b/services/mongodbflex/v1api/model_update_instance_payload.go
@@ -26,7 +26,7 @@ type UpdateInstancePayload struct {
 	FlavorId       string `json:"flavorId"`
 	// Labels field is not certain/clear
 	Labels               *map[string]string `json:"labels,omitempty"`
-	Name                 string             `json:"name" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1,61}[A-Za-z0-9_]$"`
+	Name                 string             `json:"name" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1\\,61}[A-Za-z0-9_]$"`
 	Options              map[string]string  `json:"options"`
 	Replicas             int32              `json:"replicas"`
 	Storage              Storage            `json:"storage"`
diff --git a/services/mongodbflex/v1api/model_update_user_payload.go b/services/mongodbflex/v1api/model_update_user_payload.go
index 08ad0151d..ba3d0dbff 100644
--- a/services/mongodbflex/v1api/model_update_user_payload.go
+++ b/services/mongodbflex/v1api/model_update_user_payload.go
@@ -21,7 +21,7 @@ var _ MappedNullable = &UpdateUserPayload{}
 
 // UpdateUserPayload struct for UpdateUserPayload
 type UpdateUserPayload struct {
-	Database string `json:"database" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1,61}[A-Za-z0-9_]$"`
+	Database string `json:"database" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1\\,61}[A-Za-z0-9_]$"`
 	// The roles defined for a user. Currently only one role in the list is supported, therefore only the first role from this list is used. The *roles* attribute can contain the following values: 'read', 'readWrite', 'readAnyDatabase', 'readWriteAnyDatabase', 'stackitAdmin'. **The 'readAnyDatabase', 'readWriteAnyDatabase' and 'stackitAdmin' roles will always be created in the admin database.**
 	Roles                []string `json:"roles"`
 	AdditionalProperties map[string]interface{}
diff --git a/services/mongodbflex/v2api/client.go b/services/mongodbflex/v2api/client.go
index 1abf3a268..5e908e875 100644
--- a/services/mongodbflex/v2api/client.go
+++ b/services/mongodbflex/v2api/client.go
@@ -462,6 +462,15 @@ func (c *APIClient) decode(v interface{}, b []byte, contentType string) (err err
 		*s = string(b)
 		return nil
 	}
+	if r, ok := v.(*io.Reader); ok {
+		*r = bytes.NewReader(b)
+		return nil
+	}
+	// Must stay before the JSON branch: json.Unmarshal would base64-decode into *[]byte.
+	if p, ok := v.(*[]byte); ok {
+		*p = b
+		return nil
+	}
 	if f, ok := v.(*os.File); ok {
 		f, err = os.CreateTemp("", "HttpClientFile")
 		if err != nil {
diff --git a/services/mongodbflex/v2api/model_create_instance_payload.go b/services/mongodbflex/v2api/model_create_instance_payload.go
index b00662622..5364fd4bf 100644
--- a/services/mongodbflex/v2api/model_create_instance_payload.go
+++ b/services/mongodbflex/v2api/model_create_instance_payload.go
@@ -27,7 +27,7 @@ type CreateInstancePayload struct {
 	FlavorId       string `json:"flavorId"`
 	// Labels field is not certain/clear
 	Labels               *map[string]string `json:"labels,omitempty"`
-	Name                 string             `json:"name" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1,61}[A-Za-z0-9_]$"`
+	Name                 string             `json:"name" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1\\,61}[A-Za-z0-9_]$"`
 	Options              map[string]string  `json:"options"`
 	Replicas             int32              `json:"replicas"`
 	Storage              Storage            `json:"storage"`
diff --git a/services/mongodbflex/v2api/model_create_user_payload.go b/services/mongodbflex/v2api/model_create_user_payload.go
index 6681f54bc..b4e934ece 100644
--- a/services/mongodbflex/v2api/model_create_user_payload.go
+++ b/services/mongodbflex/v2api/model_create_user_payload.go
@@ -21,10 +21,10 @@ var _ MappedNullable = &CreateUserPayload{}
 
 // CreateUserPayload struct for CreateUserPayload
 type CreateUserPayload struct {
-	Database string `json:"database" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1,61}[A-Za-z0-9_]$"`
+	Database string `json:"database" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1\\,61}[A-Za-z0-9_]$"`
 	// The roles defined for a user. Currently only one role in the list is supported, therefore only the first role from this list is used. The *roles* attribute can contain the following values: 'read', 'readWrite', 'readAnyDatabase', 'readWriteAnyDatabase', 'stackitAdmin'. **The 'readAnyDatabase', 'readWriteAnyDatabase' and 'stackitAdmin' roles will always be created in the admin database.**
 	Roles                []string `json:"roles"`
-	Username             *string  `json:"username,omitempty" validate:"regexp=^[A-Za-z][A-Za-z0-9-]{1,61}[A-Za-z0-9]$"`
+	Username             *string  `json:"username,omitempty" validate:"regexp=^[A-Za-z][A-Za-z0-9-]{1\\,61}[A-Za-z0-9]$"`
 	AdditionalProperties map[string]interface{}
 }
 
diff --git a/services/mongodbflex/v2api/model_partial_update_instance_payload.go b/services/mongodbflex/v2api/model_partial_update_instance_payload.go
index 8cf5db8d6..59102e655 100644
--- a/services/mongodbflex/v2api/model_partial_update_instance_payload.go
+++ b/services/mongodbflex/v2api/model_partial_update_instance_payload.go
@@ -25,7 +25,7 @@ type PartialUpdateInstancePayload struct {
 	FlavorId       *string `json:"flavorId,omitempty"`
 	// Labels field is not certain/clear
 	Labels               *map[string]string `json:"labels,omitempty"`
-	Name                 *string            `json:"name,omitempty" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1,61}[A-Za-z0-9_]$"`
+	Name                 *string            `json:"name,omitempty" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1\\,61}[A-Za-z0-9_]$"`
 	Options              *map[string]string `json:"options,omitempty"`
 	Replicas             *int32             `json:"replicas,omitempty"`
 	Storage              *Storage           `json:"storage,omitempty"`
diff --git a/services/mongodbflex/v2api/model_partial_update_user_payload.go b/services/mongodbflex/v2api/model_partial_update_user_payload.go
index c7c007651..9cd7b4ceb 100644
--- a/services/mongodbflex/v2api/model_partial_update_user_payload.go
+++ b/services/mongodbflex/v2api/model_partial_update_user_payload.go
@@ -20,7 +20,7 @@ var _ MappedNullable = &PartialUpdateUserPayload{}
 
 // PartialUpdateUserPayload struct for PartialUpdateUserPayload
 type PartialUpdateUserPayload struct {
-	Database *string `json:"database,omitempty" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1,61}[A-Za-z0-9_]$"`
+	Database *string `json:"database,omitempty" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1\\,61}[A-Za-z0-9_]$"`
 	// The roles defined for a user. Currently only one role in the list is supported, therefore only the first role from this list is used. The *roles* attribute can contain the following values: 'read', 'readWrite', 'readAnyDatabase', 'readWriteAnyDatabase', 'stackitAdmin'. **The 'readAnyDatabase', 'readWriteAnyDatabase' and 'stackitAdmin' roles will always be created in the admin database.**
 	Roles                []string `json:"roles,omitempty"`
 	AdditionalProperties map[string]interface{}
diff --git a/services/mongodbflex/v2api/model_update_instance_payload.go b/services/mongodbflex/v2api/model_update_instance_payload.go
index d0bc87aac..3f01b49b7 100644
--- a/services/mongodbflex/v2api/model_update_instance_payload.go
+++ b/services/mongodbflex/v2api/model_update_instance_payload.go
@@ -26,7 +26,7 @@ type UpdateInstancePayload struct {
 	FlavorId       string `json:"flavorId"`
 	// Labels field is not certain/clear
 	Labels               *map[string]string `json:"labels,omitempty"`
-	Name                 string             `json:"name" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1,61}[A-Za-z0-9_]$"`
+	Name                 string             `json:"name" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1\\,61}[A-Za-z0-9_]$"`
 	Options              map[string]string  `json:"options"`
 	Replicas             int64              `json:"replicas"`
 	Storage              Storage            `json:"storage"`
diff --git a/services/mongodbflex/v2api/model_update_user_payload.go b/services/mongodbflex/v2api/model_update_user_payload.go
index 503b91b58..3ef0fba1a 100644
--- a/services/mongodbflex/v2api/model_update_user_payload.go
+++ b/services/mongodbflex/v2api/model_update_user_payload.go
@@ -21,7 +21,7 @@ var _ MappedNullable = &UpdateUserPayload{}
 
 // UpdateUserPayload struct for UpdateUserPayload
 type UpdateUserPayload struct {
-	Database string `json:"database" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1,61}[A-Za-z0-9_]$"`
+	Database string `json:"database" validate:"regexp=^[A-Za-z_][A-Za-z0-9-_]{1\\,61}[A-Za-z0-9_]$"`
 	// The roles defined for a user. Currently only one role in the list is supported, therefore only the first role from this list is used. The *roles* attribute can contain the following values: 'read', 'readWrite', 'readAnyDatabase', 'readWriteAnyDatabase', 'stackitAdmin'. **The 'readAnyDatabase', 'readWriteAnyDatabase' and 'stackitAdmin' roles will always be created in the admin database.**
 	Roles                []string `json:"roles"`
 	AdditionalProperties map[string]interface{}