phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 2

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9b446126b15650b6c2d56349112896ca', -1, 1728639698, 1728639698, '03ec56b8', -10, 0, 0)

Line : 187
File : sessions.php