Qiime2Picrust_reference database input

Hi All, I have just started analyzing my own dataset with Qiime2Picrust,
I have a question regarding the input of reference database:

While running the command for data analysis, I have used the picrust2_default_sepp_ref.qza file which I have downloaded during running the tutorial dataset. I am not sure if I need to use other files.

(qiime2-2019.10) [email protected]:~/Kang_dataset_picrust$ qiime fragment-insertion sepp --i-representative-sequences rep-seqs.qza --p-threads 1 --i-reference-database picrust2_default_sepp_ref.qza --output-dir kangdata_out
Could you please suggest if it is the right way or I need to follow a different way?

Thanks in advance.