pkg results in errors "different from original checksum, not removing"

[Victor]

Under FreeBSD 10.3 I wanted to remove python 3.5 which I had installed by means of pkg.
Now

sudo pkg remove python35
Password:
Checking integrity... done (0 conflicting)
Deinstallation has been requested for the following 5 packages (of 0 packages in the universe):

Installed packages to be REMOVED:
	python35-3.5.1_3
	py35-setuptools35-20.0
	py35-gdbm-3.5.1_4
	py35-tkinter-3.5.1_6
	py35-sqlite3-3.5.1_7

Number of packages to be removed: 5

The operation will free 101 MiB.

Proceed with deinstalling packages? [y/N]: y
[1/5] Deinstalling py35-gdbm-3.5.1_4...
[1/5] Deleting files for py35-gdbm-3.5.1_4: 100%
[2/5] Deinstalling py35-tkinter-3.5.1_6...
[2/5] Deleting files for py35-tkinter-3.5.1_6: 100%
[3/5] Deinstalling py35-sqlite3-3.5.1_7...
[3/5] Deleting files for py35-sqlite3-3.5.1_7: 100%
[4/5] Deinstalling py35-setuptools35-20.0...
[4/5] Deleting files for py35-setuptools35-20.0: 100%
[5/5] Deinstalling python35-3.5.1_3...
[5/5] Deleting files for python35-3.5.1_3:   0%
pkg: /usr/local/bin/2to3-3.5 different from original checksum, not removing
[5/5] Deleting files for python35-3.5.1_3:   0%
pkg: /usr/local/bin/idle3.5 different from original checksum, not removing
[5/5] Deleting files for python35-3.5.1_3:   0%
pkg: /usr/local/bin/pydoc3.5 different from original checksum, not removing
[5/5] Deleting files for python35-3.5.1_3:   0%
pkg: /usr/local/bin/python3.5 different from original checksum, not removing
[5/5] Deleting files for python35-3.5.1_3:   0%
pkg: /usr/local/bin/python3.5-config different from original checksum, not removing
[5/5] Deleting files for python35-3.5.1_3:   0%
pkg: /usr/local/bin/python3.5m different from original checksum, not removing
[5/5] Deleting files for python35-3.5.1_3:   0%
pkg: /usr/local/bin/python3.5m-config different from original checksum, not removing
[5/5] Deleting files for python35-3.5.1_3:   0%
pkg: /usr/local/bin/pyvenv-3.5 different from original checksum, not removing
[5/5] Deleting files for python35-3.5.1_3:   1%
pkg: /usr/local/lib/libpython3.5m.so different from original checksum, not removing
[5/5] Deleting files for python35-3.5.1_3:  47%
pkg: /usr/local/lib/python3.5/multiprocessing/dummy/__pycache__/__init__.cpython-35.opt-1.pyc different from original checksum, not removing
[5/5] Deleting files for python35-3.5.1_3:  47%


etc.
What should I do to remove the installed package?
Ciao
Vittorio