Bootcamp not bootable after Sierra reinstall

After I reinstalled Sierra, I no longer see my Bootcamp partition as a boot option at startup (when pressing alt). Instead I see "Recovery disk". Macintosh HD is still there and working fine.

I have to mention, I resized Sierra partition (smaller) because I need to give more GBs to the Bootcamp partition; I hope I can do that later from Windows, when/if I'll be able to log back in there.

I checked around, I can see many similar problems but I guess every case is different.

Situation is now:

MacBook-Pro:~ ag$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *251.0 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 30.0 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Apple_HFS Senza titolo 160.0 GB disk0s4

5: Microsoft Basic Data BOOTCAMP 60.0 GB disk0s5