Device does not have enough space for upgrade . (370002)

Does anyone know if this can be triggered by repeating the same version of firmware update?
I seem to have plenty of space everywhere - rootfs only 35% full.
I need to repeat version to restore integrity.

Solved by running dpkg -i sq…[firmware update version]…deb
Although it seemed the Apache scripts were doing a lot else, dpkg alone did a complete and uncorrupted reset of the whole root system with the complex preinstall and postinstall scripts within the deb. Best to clear /CacheVolume/update out first, though.