phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ab70e1953af1bdfbc7b08d75e5f41c35' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('ab70e1953af1bdfbc7b08d75e5f41c35', -1, 1777297178, 1777297178, 'd849d86c', -4, 0, 0)

Line : 215
File : sessions.php