When deleting a message for a signup, due to there being a db-level restriction of one signup per channel, it causes an error. Specifically a "already replied or deferred".
Reproduction
Create a signup in a channel
Delete the signup message
Attempt to create another signup in that same channel
When deleting a message for a signup, due to there being a db-level restriction of one signup per channel, it causes an error. Specifically a "already replied or deferred".
Reproduction