diff --git a/CHANGELOG.md b/CHANGELOG.md
index e463b78f7e..df776b7964 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,18 +5,28 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## [Unreleased]
+
+
+
+## [4.6.0] - 2024-02-20
### Added
- Added concept to conform with IndustryCore Changes CX-0126 and CX-127
+- Added release instructions to CONTRIBUTING.md
- EdcAssetService capable to create assets inside EDC
- EdcPolicyDefinitionService capable to create polices inside EDC
- EdcContractDefinitionService capable to create contracts inside EDC
### Changed
- Updated AUTHORS.md
+- Reduced log level in MeterRegistryService in order to avoid excessive logging
-## [4.5.1] - 2024-02-07
+### Fixed
+- Fixed Log4J configuration
+- Fix tavern and cucumber tests
+
+## [4.5.1] - 2024-02-20
### Changed
-- moved Docker notice to separate file #425
+- Moved Docker notice to separate file #425
## [4.5.0] - 2024-02-07
### Added
@@ -524,7 +534,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
### Unresolved
- **Select Aspects you need** You are able to select the needed aspects for which you want to collect the correct endpoint information.
-[Unreleased]: https://github.com/eclipse-tractusx/item-relationship-service/compare/4.5.1...HEAD
+[Unreleased]: https://github.com/eclipse-tractusx/item-relationship-service/compare/4.6.0...HEAD
+[4.6.0]: https://github.com/eclipse-tractusx/item-relationship-service/compare/4.5.1...4.6.0
+[4.5.1]: https://github.com/eclipse-tractusx/item-relationship-service/compare/4.5.0...4.5.1
[4.5.1]: https://github.com/eclipse-tractusx/item-relationship-service/compare/4.5.0...4.5.1
[4.5.0]: https://github.com/eclipse-tractusx/item-relationship-service/compare/4.4.0...4.5.0
[4.4.0]: https://github.com/eclipse-tractusx/item-relationship-service/compare/4.3.0...4.4.0
diff --git a/COMPATIBILITY_MATRIX.md b/COMPATIBILITY_MATRIX.md
index 9f80503b13..1d5acd4792 100644
--- a/COMPATIBILITY_MATRIX.md
+++ b/COMPATIBILITY_MATRIX.md
@@ -2,6 +2,22 @@
Full changelog of IRS: [changelog](CHANGELOG.md)
+
+## [4.6.0] - 2024-02-20
+| Dependency | Version | Helm | Comments |
+|---------------------------|------------------------------|------------|-----------------|
+| EDC | 0.5.3 | 0.5.3 | |
+| EDC PostgresSQL | 15.1.0-debian-11-r12 | 12.1.6 | Optional |
+| MIW | 0.1.0 | 0.1.0 | REST connection |
+| Semantics Hub | 0.1.29 | v0.2.11-M1 | REST connection |
+| DTR | 0.3.14-M1 | 0.3.22 | REST connection |
+| Minio | RELEASE.2022-11-11T03-44-20Z | 5.0.1 | |
+| SingleLevelBomAsBuilt | 2.0.0 | - | Model version |
+| SingleLevelBomAsPlanned | 2.0.0 | - | Model version |
+| SingleLevelBomAsSpecified | 1.0.0 | - | Model version |
+| SingleLevelUsageAsBuilt | 2.0.0 | - | Model version |
+
+
## [4.2.0] - 2023-11-28
| Dependency | Version | Helm | Comments |
|---------------------------|------------------------------|------------|-----------------|
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 1c6bc91c34..8300354d0e 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -152,14 +152,28 @@ https://github.com/google/google-java-format/blob/master/README.md#intellij-jre-
### Create a release
-1. Choose a release version. Use semantic versioning!
+1. Choose a release version. Use semantic versioning! Create a respective branch e.g. `chore/prepare-release-2.6.1`.
2. Add release notes for new version in [CHANGELOG.md](CHANGELOG.md) and [charts/irs-helm/CHANGELOG.md](charts/irs-helm/CHANGELOG.md) (e.g. https://github.com/catenax-ng/tx-item-relationship-service/pull/328)
-3. Update [COMPATIBILITY_MATRIX.md](COMPATIBILITY_MATRIX.md)
-4. Create Git tag for the desired release version `git tag x.x.x`
-5. Push Git tag to repository `git push origin x.x.x`
-6. Wait for release workflow to complete
-7. Merge the automatically opened PR by github-actions bot
-8. Notify about the release in IRS Matrix Chat
+3. Update [COMPATIBILITY_MATRIX.md](COMPATIBILITY_MATRIX.md) (see [catena-x-environments](https://github.com/catenax-ng/tx-item-relationship-service/tree/catena-x-environments/charts/irs-environments))
+4. Create pull request and merge to main
+5. Create Git tag for the desired release version `git tag x.x.x`
+ (the irs-helm tag will be created by the github workflow based on the version in the irs-helm changelog)
+6. Push Git tag to repository `git push origin x.x.x`
+7. Wait for release workflow to complete
+8. Merge the automatically opened PR by github-actions bot
+9. Create pull request to eclipse-tractusx
+10. Notify about the release in IRS Matrix Chat. Template:
+
+ > **IRS Release x.x.x**
+ >
+ > IRS version x.x.x is released.
+ >
+ > https://github.com/eclipse-tractusx/item-relationship-service/releases/tag/x.x.x
+ > https://github.com/eclipse-tractusx/item-relationship-service/releases/tag/irs-helm-y.y.y
+ > **Full Changelog:** https://github.com/eclipse-tractusx/item-relationship-service/compare/w.w.w...x.x.x
+
+ _(replace x.x.x with IRS version to release, y.y.y with IRS helm version to release and w.w.w with previous IRS version)_
+
## Contact
diff --git a/charts/irs-helm/CHANGELOG.md b/charts/irs-helm/CHANGELOG.md
index 5905fbac62..d5cc57894e 100644
--- a/charts/irs-helm/CHANGELOG.md
+++ b/charts/irs-helm/CHANGELOG.md
@@ -6,10 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
## [Unreleased]
-## [6.14.1] - 2024-02-20
+## [6.15.0] - 2024-02-20
### Changed
-- Update IRS version to 4.5.1
-
+- Update IRS version to 4.6.0
## [6.14.0] - 2024-02-07
### Added