phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '3f66a185055e0f8fe4f18418e12d04f2' 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 ('3f66a185055e0f8fe4f18418e12d04f2', -1, 1529949232, 1529949232, '1714ec3d', 3, 0, 0)

Line : 187
File : sessions.php