phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '30e21f412b668f0f2c3f68b72d775e7d' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('30e21f412b668f0f2c3f68b72d775e7d', -1, 1770706685, 1770706685, 'd849d88f', -4, 0, 0)

Line : 187
File : sessions.php