In the following use case the transition can only be executed, if all blocking issues are resolved with the resolution Fixed or Done.
Add the condition or validator to the desired transition or create a new transition.
Choose is blocked by
You might want to update the link type according to your needs.
Choose Fixed, Done
You might want to update the resolutions according to your needs.
Choose Any project
Check the following options:
All blocking issues must have a resolution of Fixed or Done.
Condition on linked issues
Validation of linked issues