The lookup table is already checked out to you for modification in another session. If you have the lookup table checked out for modification in another session, close that session and try again. Alternatively, on the Server Setttings page in Project Web App, you can force a check-in of the custom field.
The lookup field is not valid because the reference list or list column does not exist. Delete the field and recreate it. ...
The lookup field was not created. The database engine could not lock the table '|1' because it is already in use by another ...
The lookup row source SQL statement must include the source table primary key field and that field must be the bound column. ...
The lookup table data entry option is set to restrict the field to only those items in the list. This may invalidate some ...
The lookup table is already checked out to you for modification in another session. If you have the lookup table checked ...
The lookup table is already checked out to you for modification in another session. Would you like to force check-in the ...
The lookup table is currently in use by a custom field and cannot be deleted. Delete the custom field referencing the lookup ...
The lookup table is in use by one or more custom fields. Delete the custom fields that are referencing the lookup table and ...
The lookup table specified for the custom field is of a different type. Specify a lookup table that is of the same type as ...