I think this is a more specific Yocto problem so therefore I'm trying Stack Overflow:
During my Petalinux 2017.1 build I get the following warnings for a few packages, all of them in the recipes-core:
The init-ifupdown:do_unpack sig is computed to be cad131d20f065f81a9524376bd7d40bc, but the sig is locked to f2c445306ecd0f9936cc1b9d35a0587e in SIGGEN_LOCKEDSIGS_t-cortexa9hf-neon
These scripts are mostly used to substitute config files like /etc/network/interfaces and such. It seems these config files are not changed, so I was wondering if this warning is related.
I did not have this problem in Petalinux 2016.4, so the recipes has been given a run through before.