Bain Attribute not exist in Template

Hi Everyone,

While Support conversion, Iam facing the error.

(2,201) Element TMPLATE 1 of FIXING /PSXXX-XXXX/STRU/V4/S1/FITT1 does not have attribute BAIN

What is this BAIN Attribute?

I need some support to find the issue.

PML Tracing not helping me.