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 ('a2ccc13ba8e3e28e9b59fce84d92b70f', -1, 1490589497, 1490589497, '36ccfc25', -4, 0, 0)

Line : 189
File : sessions.php