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 ('22e66fc955dc5bc5ce6dcd9cd0a5dd9f', -1, 1490715801, 1490715801, '36c596ff', 30, 0, 0)

Line : 189
File : sessions.php