
Assuming repopulate is required, the following result was found.
snippet of code to store the entries in the lookup already selected, check against another table/form for valid options, repopulate the list with the selected item and filtering the options available for selection. Why? This was for a multi lookup with...

bc1qf6elrdxc968h0k673l2djc9wrpazhqtxw8qqp4
0xb038962F3809b425D661EF5D22294Cf45E02FebF