Project with too much resources

[Vega]

I'm in a city where there is a project for a hammer with too much resources:

Materiales: piedra (100 gramos usados de 50 gramos necesarios)

[Materials: Stone (100 grams used of 50 grams required)]

So we can't work on it because it appears an error message:

ERROR: Usted necesita usar -50 gramos de stone primero=

[You need to use -50 grams of stone first]

Thanks!!

[EchoMan]

Can you send the details in a PM to me?
(What you named the town/location of the project)