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 ('3a8f09b3bc6791faf6f68f5aa95a4e43', -1, 1488203061, 1488203061, '369e641a', 31, 0, 0)

Line : 189
File : sessions.php