VDB file sequence suffix problem

Hi,

I am trying to do some simulations in Blender which are then to be exported using OpenVDB and opened in another program. Unfortunately, for some stupid reason, blender seems to add constant suffix after the file sequence number padding, so none of the software recognizes it as a sequence:



Obviously, the last part of the file name always has to be the actual frame number padding, not some suffix. How do I remove it?

Thanks.