Users will receive the different error messages on issue creation when their lookup field is empty, depending where your lookup post function is placed in "create" workflow transition.
Before "Create the issue originally" |
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After "Create the issue originally" |  |
Thus, to display our customised error message for the value of the field used for the lookup, we would recommend users to place their lookup post function before "Create the issue originally".
When a Lookup Value is not found in the Lookup Table
