Error retrieving spectra headers

[dr-rodriguez]

In some cases, astrodbkit has problems retrieving the header for certain spectra.
For example:

x = db.query("SELECT spectrum FROM spectra WHERE id=398", fmt='dict', fetch='one')['spectrum']
x.header

will crash for ids 398 (a text file) and 233 (a fits file)

Need to see what could be the cause(s) here.