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 ('c9110a32b949c7fb7d825a4b9673866a', -1, 1730489879, 1730489879, '0393cdb2', -1, 0, 0)

Line : 195
File : sessions.php