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 ('8eedc0f3f0187ab48c99396a252e49fa', -1, 1506144774, 1506144774, '36e0e633', 6, 0, 0)

Line : 186
File : sessions.php