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 ('87a2200017f5840203a0ec46be9c0f97', -1, 1714019402, 1714019402, '038590d9', -11, 0, 0)

Line : 187
File : sessions.php