For AWS CloudFormation, which stack state refuses UpdateStack calls?

Explanations:

The stack stateUPDATE_ROLLBACK_FAILEDindicates that a previous update attempt has failed and the stack is in an inconsistent state. In this state, CloudFormation cannot process any further update requests until the issue is resolved. Therefore,UpdateStackcalls are refused.

TheUPDATE_ROLLBACK_COMPLETEstate indicates that the stack has successfully rolled back to its previous state after a failed update. In this state, updates can be made, andUpdateStackcalls are allowed.

TheUPDATE_COMPLETEstate means that the stack update was successful. This state allows for further updates, soUpdateStackcalls are permitted.

TheCREATE_COMPLETEstate indicates that the stack was created successfully. Just like in theUPDATE_COMPLETEstate, this allows for future updates, andUpdateStackcalls are accepted.