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 ('aba0db00cf66bd121a82717f5d02ef02', -1, 1713913538, 1713913538, '12bdaa11', -4, 0, 0)

Line : 187
File : sessions.php