phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ac0f5544b43166f747f439b6e3234ae5' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('ac0f5544b43166f747f439b6e3234ae5', -1, 1763646125, 1763646125, 'd849d8db', -4, 0, 0)

Line : 215
File : sessions.php