Outstanding mortgage principal on 1/1 has no balance for HELOC, TT review complains. 12/31 had principal for home addition. How do I get past problem of $0 on 1/1?

When entering 1098, TT wants the beginning balance as of 1/1.  The loan is a HELOC and had a 0 balance on 1/1.  The HELOC was used for a home remodel, so at the end of the year there was a principal balance and mortgage interest was paid.  TT review complains that the beginning balance cannot be 0. How do you fix this so TT does not complain in the review?  Or is this a TT bug?