phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4796dc5a4b4cbd055772bfbf80b7d6a4' 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 ('4796dc5a4b4cbd055772bfbf80b7d6a4', -1, 1773581811, 1773581811, 'd849d82b', -4, 0, 0)

Line : 215
File : sessions.php