Pamac checkupdates -a lists a number of (null) things from flathub

Support Snap/Flatpak
1

This is the output:

❯ pamac checkupdates -a
12 available updates:
gnome-shell-extension-disable-workspace-switcher-popup-git  cf509c4-1 -> 486e131-1                                                         AUR
(null)                                                                   8.81.0.268                                                        flathub
(null)                                                                   2.0.1                                                             flathub
(null)                                                                   303eba755fb017062d764ee0cdbcb5faca0114ababa19167aed3855e45e8bd26  flathub
(null)                                                                   21.3.6                                                            flathub
(null)                                                                   2a02a66d453326d5c0db4ec036cbba1af24d92bb33534fcc1f4f0bc13e002ee1  flathub
(null)                                                                   1bc1f826fcae6ece0a9674ef0c8ab0607b815f9e339b3f6df561ded8711b0b19  flathub
(null)                                                                   21.08.11                                                          flathub
(null)                                                                   0ef0437a0e351715288bb2f075c5361d92666a5d6f20c614f64e90d55648b02e  flathub
(null)                                                                   21.08.11                                                          flathub
(null)                                                                   03ecdc904e49b326ed86f1a45e707a0462d325555111e384774a4d3715f97fb9  flathub
(null)                                                                   6603dc6b728731bbaa7f1f1abbae3007cc3f029f72c40a9f1c43c7ff3c799b4f  flathub

What are these (nulls) and what should i do about them?