phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('d97fce09a5b1a89080e4c761b8f64123', -1, 1511529339, 1511529339, '36c6026e', -4, 0, 0)

Line : 187
File : sessions.php