phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4b0c9dfce9acad7e78552825e69c46c7' 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 ('4b0c9dfce9acad7e78552825e69c46c7', -1, 1767704423, 1767704423, 'd849d8b2', 6, 0, 0)

Line : 187
File : sessions.php