وَهِيَ جَائِزَةٌ فِي جَمِيعِ السَّنَةِ، إِلَّا خَمْسَةَ أَيَّامٍ يُكْرَهُ فِعْلُهَا فِيهَا:
Translation: It is permissible throughout the year, except five days during which performing it is disliked.
Jāʾizah states the general permission; yukrahu marks an exception of disapproval during five days.
The clause is about karahah. Do not silently replace the wording with a blanket claim that every Umrah performed on those dates is void.