phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'aa5c16b82b14b04127f1e29f1b6d46e2' 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 ('aa5c16b82b14b04127f1e29f1b6d46e2', -1, 1770719474, 1770719474, '126109aa', -4, 0, 0)

Line : 187
File : sessions.php