phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'efb252da35f8fb15b5f2c5494d3f0000' 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 ('efb252da35f8fb15b5f2c5494d3f0000', -1, 1770218904, 1770218904, 'd849d805', -4, 0, 0)

Line : 187
File : sessions.php