Rare Window Of Opertunity

SOOOOO this coming Sunday I may have the chance to brew AND while I'm doing that keg one I have in the fermenter......I have come up with a cunning plan to keg and not clean the fermenter but just dump my freshly brewed wort straight into the fermenter and add a little bit of yeast I pulled from the fermenter earlier in the picture as these brews call for the same yeast would this be an issue to not clean the fermenter????.....I will be spraying starsan etc around the lid etc for piece of mind..

I guess what im asking is is it ok to not clean your fermenter and just swap out wort?