Invalid utf8mb4 character string

[auggy]

I get this error all the time when adding anything to the db. I'm using mysql.

/home/rick/.local/lib/python2.7/site-packages/pymysql/cursors.py:166: Warning: (1300, u"Invalid utf8mb4 character string: '95F4B5'")
  result = self._query(query)
/home/rick/.local/lib/python2.7/site-packages/pymysql/cursors.py:166: Warning: (1300, u"Invalid utf8mb4 character string: '82CB98'")
  result = self._query(query)
/home/rick/.local/lib/python2.7/site-packages/pymysql/cursors.py:166: Warning: (1300, u"Invalid utf8mb4 character string: '950656'")
  result = self._query(query)
/home/rick/.local/lib/python2.7/site-packages/pymysql/cursors.py:166: Warning: (1300, u"Invalid utf8mb4 character string: '87C807'")
  result = self._query(query)
/home/rick/.local/lib/python2.7/site-packages/pymysql/cursors.py:166: Warning: (1300, u"Invalid utf8mb4 character string: 'B5DCDD'")
  result = self._query(query)
/home/rick/.local/lib/python2.7/site-packages/pymysql/cursors.py:166: Warning: (1300, u"Invalid utf8mb4 character string: 'DDE1ED'")
  result = self._query(query)
/home/rick/.local/lib/python2.7/site-packages/pymysql/cursors.py:166: Warning: (1300, u"Invalid utf8mb4 character string: 'ABDA18'")
  result = self._query(query)
/home/rick/.local/lib/python2.7/site-packages/pymysql/cursors.py:166: Warning: (1300, u"Invalid utf8mb4 character string: 'CB71A2'")
  result = self._query(query)

[spl0k]

Is the data you're trying to add when you get this warning still added to the database?
Which version of mysql and pymysql are you using?

Most likely relevant:
PyMySQL/PyMySQL#644
https://bugs.mysql.com/bug.php?id=79317