Unclear error message when using sdate in the file wildcard, and sdate is also a dimension of the provided time values

Hi, when running a very similar case of example 2 (https://earth.bsc.es/gitlab/es/startR/-/blob/master/inst/doc/usecase/ex1_2_exp_obs_attr.R), I used sdate instead of date in the observations wildcard (and subsequent startR call), and I got an error:

Error in Start(sdate = unique(format(vdates, "%Y%m")), time = values(vdates),  : 
  Size of selector file dimensions must mach size of requested variable dimensions.

The error is unclear, and probably the problem comes from the fact that sdate is already a dimension name of the vdates array that is used to define times to select in time=values(vdates).

Maybe we should document that the wildcard of the observations cannot be the same used for the model in this example.