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 ('dc22f42c364af7f1846da6b43f35ddc6', -1, 1714019991, 1714019991, '1276c856', -10, 0, 0)

Line : 187
File : sessions.php