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 ('416df7152e4ec3f1a1a18d1a86a3ec0e', -1, 1524137363, 1524137363, '1714f5c0', 12, 0, 0)

Line : 187
File : sessions.php