phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : -1 ERROR: duplicate key value violates unique constraint "phpbb_session_pkey" DETAIL: Key (session_id)=(9a8797cd5e56c9d0762d29eb109b52a7) already exists.

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9a8797cd5e56c9d0762d29eb109b52a7', -1, 1714110880, 1714110880, '12bf5420', 98, 0, 0)

Line : 187
File : sessions.php