Unable to add data after creating the HDF files

[suhail017]

Hi
I am creating a netcdf file using hdf5r package with the following attributes

> ds
Class: H5File
Filename: /home/suhail/Downloads/cheswx/station_data/homog_ref/prcp_homog_ref_19480101_20171231.nc
Access type: H5F_ACC_RDWR
Attributes: _NCProperties
Listing:
                name    obj_type dataset.dims dataset.type_class
          station_id H5I_DATASET    11 x 1681         H5T_STRING
   string_station_id H5I_DATASET           11          H5T_FLOAT
                time H5I_DATASET          840          H5T_FLOAT
           longitude H5I_DATASET         1681          H5T_FLOAT
           elevation H5I_DATASET         1681          H5T_FLOAT
        station_name H5I_DATASET    32 x 1681         H5T_STRING
            latitude H5I_DATASET         1681          H5T_FLOAT
 string_station_name H5I_DATASET           32          H5T_FLOAT
                prcp H5I_DATASET   1681 x 840          H5T_FLOAT

But whenever i try to add data (obs_adj) to the existing file (ds) , it give me following error:

ds[prcp][] <- obs_adj
Error in `*tmp*`["prcp"] : 
  object of type 'environment' is not subsettable

Also, if i use the following syntax, it gives me another error

ds[['prcp']] <- obs_adj

Error in `[[<-.H5File`(`*tmp*`, "prcp", value = c(157.4, 53.1, 274.5,  : 
  Cannot assign - already exists. Please use the 'link_delete' to delete the object before assigning a new one 

Is there any other way of adding data to a HDF5 file? Your any kind of advice or suggestion will be great. I am using R version 4.0.5 and hdf5r version 1.3.3