Thank you, the problem is now solved.
I received the following message when I ran the command: DBCC CHECKDB WITH ALL_ERRORMSGS
The In-row data RSVD page count for object "table_name", index ID 0, partition ID 12345, alloc unit ID 12345 (type In-row data) is incorrect. Run DBCC UPDATEUSAGE.
I then ran the DBCC UPDATEUSAGE, and it seems it has resolved the problem.
Thank you again!