Set the maximum length of the field once increased to the duplicate data detection rule.

Then the default behavior is to increase but not decrease the match code.

As a workaround, the maximum length is calculated and set when creating a new field.

Also, duplicate data detection rules are set while checking the value converted to the length of the match code.

If the maximum length of the reduced default field is also converted to a matching code, duplicate data detection rules can be easily set up without creating new fields.

I would like to see the maximum length value of the default field converted to a match code length.