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 ('5a4b0c389c5eb47e745a12b43c4a4c22', -1, 1513627883, 1513627883, '36a0f579', 0, 0, 0)

Line : 172
File : sessions.php