Change User Defined Field's value for entire table

Change User Defined Field's value for entire table

I have a User Defined field with legal values defined as a pick list. some of the values, defined in the form of  AB-123-C-DEF-4567 have to be changed to AB-1234-C-DEF-5678 (Adding a digit in the second part of the value).

Is there any supported method of changing all of the values in the asset database from the first value to the second value? I would rather not have to change each asset one at a time.

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