## -7024: Alter column not allowed, constraint violation

### Explanation:

An attempt was made to redefine a range of values for a particular column. The SQL statement fails when the table contains rows that violate the CONSTRAINT definition.

### User Action:

...

1. Choose another CONSTRAINT definition, or do not change the definition at all.

2. Use a QUERY statement to find out which rows do not meet the CONSTRAINT definition. You can then change or delete these.