basically they say to remove the lookuppageID, but this would affect to everyone. I would recommend to go into permissions for the user, so they can try create but causing an error.
If you wanted to change the fields shown in the lookup I guess it was done using field groups in table (view vieldgroups) but this is uncommon request I guess.
Answers
This will help:
https://community.dynamics.com/nav/f/34/t/114887
basically they say to remove the lookuppageID, but this would affect to everyone. I would recommend to go into permissions for the user, so they can try create but causing an error.
If you wanted to change the fields shown in the lookup I guess it was done using field groups in table (view vieldgroups) but this is uncommon request I guess.
Edit, yep, that was it:
https://docs.microsoft.com/en-us/dynamics-nav/how-to--customize-data-displayed-in-a-drop-down-control-using-field-groups
thnx @txeriff