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 ('976f8eb1c46c452c3f5c8e27b45759a9', -1, 1529322630, 1529322630, '369e0f61', 15, 0, 0)

Line : 187
File : sessions.php