Fix/update block workflow #324
Open
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update_block_workflow() currently does not check if the existing_workflow_id is the "FINAL" workflow.
Issue 1:
This causes the existing_workflow_id to become assigned to the "INITIAL" workflow, which can cause a patch error if the FINAL workflow does not equal the INITIAL workflow.
Issue 2:
This also prevents the blocks FINAL workflow from being patched back to the INITIAL workflow