Hello. I have seen this before, and I was able to revolve the issue by performing the following steps. I ran the folowing query on a customer project, where this exact issue was occurring. After running the query, I ran the 'Verify' and 'Repair' on the project, and the lookup list was back to normal for 'Subject' field. The issue was due to a corruption that occurred in the TS_SUBJECT and BG_SUBJECT fields within the project data tables, and the query below sets them back to where they are supposed to be. Before running the query below, it is highly recommended that you create a backup of the affected project repository and database in case any unforeseen issue occurs. You will run the query against the SYSTEM_FIELD table for the affected project. After you have run the query, verify, and repair on the affected project, retest to see if the issue still occurs.
UPDATE SYSTEM_FIELD
SET SF_ROOT_ID =
(SELECT ALM_ITEM_ID
FROM ALL_LISTS
WHERE (0 = 0)
AND AL_DESCRIPTION LIKE 'Enter_your_folder_name_here'
AND AL_FATHER (0 = 1)
WHERE (0 = 1)
OR SF_COLUMN_NAME LIKE 'TS_SUBJECT'
OR SF_COLUMN_NAME LIKE 'BG_SUBJECT'
After you have run the query, verified and repaired the project, run the following query to make sure the values displayed in the SF_ROOT_ID field for BUG and TEST have been corrected.
SELECT SF_TABLE_NAME, SF_COLUMN_NAME, SF_ROOT_ID
FROM SYSTEM_FIELD
WHERE (0 = 1)
OR SF_COLUMN_NAME LIKE 'TS_SUBJECT'
OR SF_COLUMN_NAME LIKE 'BG_SUBJECT'