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 ('cfcc2e9193b1a0a2f37d55d1af32751a', -1, 1713435481, 1713435481, '038a7ac3', -4, 0, 0)

Line : 187
File : sessions.php