diff --git a/CHANGELOG.md b/CHANGELOG.md
index eda5a8b08..3c409f100 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -413,6 +413,8 @@
     - **New**: API for STACKIT Telemetry Router
   - [v0.1.1](services/telemetryrouter/CHANGELOG.md#v011)
     - **Dependencies:** Bump STACKIT SDK core module from `v0.25.0` to `v0.26.0`
+  - [v0.2.0](services/telemetryrouter/CHANGELOG.md#v020)
+    - **Feature:** Added `_UNKNOWN_DEFAULT_OPEN_API` fallback value to all enums to handle unknown API values gracefully.
 - `vpn`:
   - [v0.4.2](services/vpn/CHANGELOG.md#v042) 
     - **Dependencies:** Bump STACKIT SDK core module from `v0.24.0` to `v0.24.1`
diff --git a/services/telemetryrouter/CHANGELOG.md b/services/telemetryrouter/CHANGELOG.md
index 72fb92c20..84ef5c57c 100644
--- a/services/telemetryrouter/CHANGELOG.md
+++ b/services/telemetryrouter/CHANGELOG.md
@@ -1,3 +1,6 @@
+## v0.2.0
+- **Feature:** Added `_UNKNOWN_DEFAULT_OPEN_API` fallback value to all enums to handle unknown API values gracefully.
+
 ## v0.1.1
 - **Dependencies:** Bump STACKIT SDK core module from `v0.25.0` to `v0.26.0`
 
diff --git a/services/telemetryrouter/VERSION b/services/telemetryrouter/VERSION
index a1c2c6a9f..81fd7ba08 100644
--- a/services/telemetryrouter/VERSION
+++ b/services/telemetryrouter/VERSION
@@ -1 +1 @@
-v0.1.1
\ No newline at end of file
+v0.2.0
\ No newline at end of file
diff --git a/services/telemetryrouter/oas_commit b/services/telemetryrouter/oas_commit
index 3417bbd13..6fdb25c73 100644
--- a/services/telemetryrouter/oas_commit
+++ b/services/telemetryrouter/oas_commit
@@ -1 +1 @@
-9918ffafed202332f2a1a5698aafa60eed59886f
+c8e6adbf2c24050dca06a64b301b3a43ba28be6e
diff --git a/services/telemetryrouter/v1betaapi/model_config_filter_level.go b/services/telemetryrouter/v1betaapi/model_config_filter_level.go
index 1091d0102..ce036f271 100644
--- a/services/telemetryrouter/v1betaapi/model_config_filter_level.go
+++ b/services/telemetryrouter/v1betaapi/model_config_filter_level.go
@@ -20,9 +20,10 @@ type ConfigFilterLevel string
 
 // List of configFilterLevel
 const (
-	CONFIGFILTERLEVEL_RESOURCE   ConfigFilterLevel = "resource"
-	CONFIGFILTERLEVEL_SCOPE      ConfigFilterLevel = "scope"
-	CONFIGFILTERLEVEL_LOG_RECORD ConfigFilterLevel = "logRecord"
+	CONFIGFILTERLEVEL_RESOURCE                 ConfigFilterLevel = "resource"
+	CONFIGFILTERLEVEL_SCOPE                    ConfigFilterLevel = "scope"
+	CONFIGFILTERLEVEL_LOG_RECORD               ConfigFilterLevel = "logRecord"
+	CONFIGFILTERLEVEL_UNKNOWN_DEFAULT_OPEN_API ConfigFilterLevel = "unknown_default_open_api"
 )
 
 // All allowed values of ConfigFilterLevel enum
@@ -30,6 +31,7 @@ var AllowedConfigFilterLevelEnumValues = []ConfigFilterLevel{
 	"resource",
 	"scope",
 	"logRecord",
+	"unknown_default_open_api",
 }
 
 func (v *ConfigFilterLevel) UnmarshalJSON(src []byte) error {
@@ -46,7 +48,8 @@ func (v *ConfigFilterLevel) UnmarshalJSON(src []byte) error {
 		}
 	}
 
-	return fmt.Errorf("%+v is not a valid ConfigFilterLevel", value)
+	*v = CONFIGFILTERLEVEL_UNKNOWN_DEFAULT_OPEN_API
+	return nil
 }
 
 // NewConfigFilterLevelFromValue returns a pointer to a valid ConfigFilterLevel
diff --git a/services/telemetryrouter/v1betaapi/model_config_filter_matcher.go b/services/telemetryrouter/v1betaapi/model_config_filter_matcher.go
index 1bbe46c4e..cc7f5d78f 100644
--- a/services/telemetryrouter/v1betaapi/model_config_filter_matcher.go
+++ b/services/telemetryrouter/v1betaapi/model_config_filter_matcher.go
@@ -20,14 +20,16 @@ type ConfigFilterMatcher string
 
 // List of configFilterMatcher
 const (
-	CONFIGFILTERMATCHER_EQUAL     ConfigFilterMatcher = "="
-	CONFIGFILTERMATCHER_NOT_EQUAL ConfigFilterMatcher = "!="
+	CONFIGFILTERMATCHER_EQUAL                    ConfigFilterMatcher = "="
+	CONFIGFILTERMATCHER_NOT_EQUAL                ConfigFilterMatcher = "!="
+	CONFIGFILTERMATCHER_UNKNOWN_DEFAULT_OPEN_API ConfigFilterMatcher = "unknown_default_open_api"
 )
 
 // All allowed values of ConfigFilterMatcher enum
 var AllowedConfigFilterMatcherEnumValues = []ConfigFilterMatcher{
 	"=",
 	"!=",
+	"unknown_default_open_api",
 }
 
 func (v *ConfigFilterMatcher) UnmarshalJSON(src []byte) error {
@@ -44,7 +46,8 @@ func (v *ConfigFilterMatcher) UnmarshalJSON(src []byte) error {
 		}
 	}
 
-	return fmt.Errorf("%+v is not a valid ConfigFilterMatcher", value)
+	*v = CONFIGFILTERMATCHER_UNKNOWN_DEFAULT_OPEN_API
+	return nil
 }
 
 // NewConfigFilterMatcherFromValue returns a pointer to a valid ConfigFilterMatcher
diff --git a/services/telemetryrouter/v1betaapi/model_destination_config_type.go b/services/telemetryrouter/v1betaapi/model_destination_config_type.go
index dc65d63b8..238097754 100644
--- a/services/telemetryrouter/v1betaapi/model_destination_config_type.go
+++ b/services/telemetryrouter/v1betaapi/model_destination_config_type.go
@@ -20,14 +20,16 @@ type DestinationConfigType string
 
 // List of destinationConfigType
 const (
-	DESTINATIONCONFIGTYPE_OPEN_TELEMETRY DestinationConfigType = "OpenTelemetry"
-	DESTINATIONCONFIGTYPE_S3             DestinationConfigType = "S3"
+	DESTINATIONCONFIGTYPE_OPEN_TELEMETRY           DestinationConfigType = "OpenTelemetry"
+	DESTINATIONCONFIGTYPE_S3                       DestinationConfigType = "S3"
+	DESTINATIONCONFIGTYPE_UNKNOWN_DEFAULT_OPEN_API DestinationConfigType = "unknown_default_open_api"
 )
 
 // All allowed values of DestinationConfigType enum
 var AllowedDestinationConfigTypeEnumValues = []DestinationConfigType{
 	"OpenTelemetry",
 	"S3",
+	"unknown_default_open_api",
 }
 
 func (v *DestinationConfigType) UnmarshalJSON(src []byte) error {
@@ -44,7 +46,8 @@ func (v *DestinationConfigType) UnmarshalJSON(src []byte) error {
 		}
 	}
 
-	return fmt.Errorf("%+v is not a valid DestinationConfigType", value)
+	*v = DESTINATIONCONFIGTYPE_UNKNOWN_DEFAULT_OPEN_API
+	return nil
 }
 
 // NewDestinationConfigTypeFromValue returns a pointer to a valid DestinationConfigType