phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '608aa0cf9785f75ddf85b78d4b1fb27c' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('608aa0cf9785f75ddf85b78d4b1fb27c', -1, 1516765294, 1516765294, '36a77e6a', 13, 0, 0)

Line : 187
File : sessions.php