fix release validation

.gitlab-ci.yml

@@ -1,4 +1,4 @@
-image: "domaindrivenarchitecture/devops-build:4.0.1"
+image: "domaindrivenarchitecture/devops-build:4.0.2"
 
 before_script:
   - python --version

src/main/python/ddadevops/domain/release.py

@@ -29,7 +29,6 @@ class Release(Validateable):
         result = []
         result += self.__validate_is_not_empty__("release_type")
         result += self.__validate_is_not_empty__("release_main_branch")
-        result += self.__validate_is_not_empty__("release_current_branch")
         result += self.__validate_is_not_empty__("release_primary_build_file")
         result += self.__validate_is_not_empty__("version")
         try:
@@ -47,8 +46,10 @@ class Release(Validateable):
                 )
         if self.version:
             result += self.version.validate()
+        if self.release_type is not None:
+            result += self.__validate_is_not_empty__("release_current_branch")
             if (
-            self.release_type is not None
+                self.release_current_branch is not None
                 and self.release_type != ReleaseType.NONE
                 and self.release_main_branch != self.release_current_branch
             ):