Feed batch subscribe: Every Feed is duplicated

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Describe the problem you’re having:
When doing a batch-subscribe of feeds, every feed gets subscribed twice.

tt-rss version (including git commit id):
Tiny Tiny RSS v19.2 (900cdbb)

Platform (i.e. Linux distro, PHP, PostgreSQL, etc) versions:
Raspian and Ubuntu 18.04, PHP 7.2, PostgreSQL

Please provide any additional information below:

this should help https://git.tt-rss.org/fox/tt-rss/commit/241d646fba172aba251197d57a330df3db4d3386

this seems to have done the trick: thanks!