phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'f53e91bd7df78f2c6609df1269af538d' 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 ('f53e91bd7df78f2c6609df1269af538d', -1, 1540344577, 1540344577, '36a6cfdf', 5, 0, 0)

Line : 187
File : sessions.php