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 ('2ce497df88b3b56b265b58e15d612af2', -1, 1714221286, 1714221286, '0311a2f7', -4, 0)

Line : 158
File : sessions.php