phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8c6e5f5c6963f4ab52f3c1e48e30fc08' 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 ('8c6e5f5c6963f4ab52f3c1e48e30fc08', -1, 1544423894, 1544423894, '36eae44e', -7, 0, 0)

Line : 187
File : sessions.php