phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('75e2c86cd9b064943996ccb2f0ef6d22', -1, 1714044572, 1714044572, '03119aab', -4, 0, 0)

Line : 187
File : sessions.php