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) VALUES ('a16388d1e366b4be44e3f92c2a2485be', -1, 1714781098, 1714781098, '031633f1', 6, 0)

Line : 158
File : sessions.php