HDL to correct multiple assignments

Summary:

We're trying to update the start date of a user, but are receiving errors that there are multiple assignments. We've then attempted to remove the additional assignments, with no luck. We do not have access to the full HCM module, so are restricted to HDL.

Content (please ensure you mask any confidential information):

When trying to update the start date of a user via HDL, we received the error message "You can't change the legal employer hire or start date if multiple assignment records exist for the same date. You must remove the records to change the date".

We've then attempted to remove the additional records using code suggested in other questions, and then received the error message "The corresponding date effective record in the {PARENTNAME} for date {DATE}, action {ACTION}, and effective sequence {SEQ} is missing for the {CHILDNAME}."