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 ('c99f2ac17e6044e61201b17110600c64', -1, 1713573517, 1713573517, '12d954ab', -4, 0, 0)

Line : 187
File : sessions.php