Pool fails to send NYMs after POOL_UPGRADE command.
Steps to Reproduce:
1. Login as Trustee.
2. Send NYM to prove that it works.
3. Send POOL_UPGRADE command with force=True and 3 nodes in schedule (it should work due to changes in
send POOL_UPGRADE name=upgrade2 version=0.4.20 sha256=e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 action=start schedule=
4. Send NYM.
Step 4 NYM sending is failed (there is no result message).
Send NYM should work normally.
Restart all nodes of the pool.
INDY-201 comments no validation for uniqueness of upgrade name is ok, but actually this validation is present (see screenshot).
Logs of all nodes are in attachment.