`disclaimer` is serialized to `COMMENT` in FITS, and astropy splits it into multiple `COMMENT` headers, e.g. from Fabio's example data: ``` COMMENT DISCLAIMER: This data product was generated from simulations. When publ COMMENT ishing any result using it, please cite the CTAO Science Data challenge. COMMENT .. ``` However, when reading it back to the class, these get clobbered (only th last one survives), rather than appended. ```json { "disclaimer": ".." } ``` I think in general if a header is repeated, the value should get appended. Need to add a test that round-trips this header (maybe all!) and checks for consistency. Make sure the `disclaimer` is set to something long, so it gets split.