diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3805a2bbc..09431bb39 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## Release (2025-xx-xx)
+- `stackitmarketplace`: [v1.16.0](services/stackitmarketplace/CHANGELOG.md#v1160)
+  - **Breaking Change:** Remove unused `ProjectId` model struct 
+
 ## Release (2025-10-29)
 - `stackitmarketplace`: [v1.15.0](services/stackitmarketplace/CHANGELOG.md#v1150)
   - **Feature:** Add `EndUserLicenseAgreement`, `ProductDescription` and `ServiceLevelAgreement` attributes and add them to `Assets` struct
diff --git a/services/stackitmarketplace/CHANGELOG.md b/services/stackitmarketplace/CHANGELOG.md
index e207ba101..29525acc8 100644
--- a/services/stackitmarketplace/CHANGELOG.md
+++ b/services/stackitmarketplace/CHANGELOG.md
@@ -1,4 +1,7 @@
-## v0.15.0
+## v1.16.0
+- **Breaking Change:** Remove unused `ProjectId` model struct 
+
+## v1.15.0
 - **Feature:** Add `EndUserLicenseAgreement`, `ProductDescription` and `ServiceLevelAgreement` attributes and add them to `Assets` struct
 
 ## v1.14.0
diff --git a/services/stackitmarketplace/VERSION b/services/stackitmarketplace/VERSION
index 440ddd8f1..a406138ee 100644
--- a/services/stackitmarketplace/VERSION
+++ b/services/stackitmarketplace/VERSION
@@ -1 +1 @@
-v1.15.0
+v1.16.0
diff --git a/services/stackitmarketplace/model_project_id.go b/services/stackitmarketplace/model_project_id.go
deleted file mode 100644
index 93347f9c6..000000000
--- a/services/stackitmarketplace/model_project_id.go
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
-STACKIT Marketplace API
-
-API to manage STACKIT Marketplace.
-
-API version: 1
-*/
-
-// Code generated by OpenAPI Generator (https://openapi-generator.tech); DO NOT EDIT.
-
-package stackitmarketplace
-
-import (
-	"encoding/json"
-)
-
-// checks if the ProjectId type satisfies the MappedNullable interface at compile time
-var _ MappedNullable = &ProjectId{}
-
-// ProjectId The associated project ID.
-type ProjectId struct {
-}
-
-// NewProjectId instantiates a new ProjectId object
-// This constructor will assign default values to properties that have it defined,
-// and makes sure properties required by API are set, but the set of arguments
-// will change when the set of required properties is changed
-func NewProjectId() *ProjectId {
-	this := ProjectId{}
-	return &this
-}
-
-// NewProjectIdWithDefaults instantiates a new ProjectId object
-// This constructor will only assign default values to properties that have it defined,
-// but it doesn't guarantee that properties required by API are set
-func NewProjectIdWithDefaults() *ProjectId {
-	this := ProjectId{}
-	return &this
-}
-
-func (o ProjectId) ToMap() (map[string]interface{}, error) {
-	toSerialize := map[string]interface{}{}
-	return toSerialize, nil
-}
-
-type NullableProjectId struct {
-	value *ProjectId
-	isSet bool
-}
-
-func (v NullableProjectId) Get() *ProjectId {
-	return v.value
-}
-
-func (v *NullableProjectId) Set(val *ProjectId) {
-	v.value = val
-	v.isSet = true
-}
-
-func (v NullableProjectId) IsSet() bool {
-	return v.isSet
-}
-
-func (v *NullableProjectId) Unset() {
-	v.value = nil
-	v.isSet = false
-}
-
-func NewNullableProjectId(val *ProjectId) *NullableProjectId {
-	return &NullableProjectId{value: val, isSet: true}
-}
-
-func (v NullableProjectId) MarshalJSON() ([]byte, error) {
-	return json.Marshal(v.value)
-}
-
-func (v *NullableProjectId) UnmarshalJSON(src []byte) error {
-	v.isSet = true
-	return json.Unmarshal(src, &v.value)
-}
diff --git a/services/stackitmarketplace/model_project_id_test.go b/services/stackitmarketplace/model_project_id_test.go
deleted file mode 100644
index 8d52b2c3c..000000000
--- a/services/stackitmarketplace/model_project_id_test.go
+++ /dev/null
@@ -1,11 +0,0 @@
-/*
-STACKIT Marketplace API
-
-API to manage STACKIT Marketplace.
-
-API version: 1
-*/
-
-// Code generated by OpenAPI Generator (https://openapi-generator.tech); DO NOT EDIT.
-
-package stackitmarketplace