Change the text field of custom field

Hi,

I have a case where a customer include is added to PA0001 and this field is picking an incorrect field (Y0PACT-YYGROUP) as a text field in Adhoc query

I want the text to be picked from Y0PACT-YYACTD.

I can see Y0PACT is assigned as a check table in PA0001. But this is not assigned as a text table.

I want to know how the ADHOC query is identifying the text field..where it is defined

Thank you