Cannot import AGS file into HoleBase owing to LOCA errors

Hi. I am having a problem with importing an AGS file into HoleBase. The error message that I get reads "no parent field in table 'LOCA':[LOCA_ID:BH210]". This repeats for all the exploratory holes in the project. When I checked the LOCA able, all the boreholes appear to be present and correct. Can you help me with correcting the issue?