All studies import with sumstats = True for sumstats-only submissions

[earlEBI]

Example:
PMID curated through old Curation App: 29058716 - 3 studies
User submitted sumstats only, for 1 study: https://www.ebi.ac.uk/gwas/deposition/submission/6712402bf8167b000159f3d5

• They entered NR for sumstats in the other 2 study rows.
  Submission_Form_Milne2017.xlsx

Sumstats-only submission was imported to Curation App with all 3 study rows having sumstats = True:

(This has since been cleaned up manually by unticking full p-value set for the 2 studies in the old Curation App).

Creating this ticket to investigate if it is a general issue.