phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '022bdcfd5332e0a5219e40e69d37ee9f' 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 ('022bdcfd5332e0a5219e40e69d37ee9f', -1, 1427444047, 1427444047, '321028c3', 12, 0, 0)

Line : 187
File : sessions.php