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 ('fd1a59a20bb5e48b0c31d050784a5707', -1, 1713570915, 1713570915, '038dc692', -4, 0, 0)

Line : 187
File : sessions.php