phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '54cfbc1d54f867da9cb8f2659e27b21f' 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 ('54cfbc1d54f867da9cb8f2659e27b21f', -1, 1548280560, 1548280560, '36901829', 5, 0, 0)

Line : 187
File : sessions.php