Do Quran verses 11:1 and 2:106 contradict each other?

Verse 11:1 translates to " Alif-Lãm-Ra. ˹This is˺ a Book whose verses are well perfected and then fully explained. ˹It is˺ from the One ˹Who is˺ All-Wise, All-Aware. " - this means that the Quran was perfected by Allah SWT.

Verse 2:106 translates to " We do not abrogate a verse or cause it to be forgotten except that We bring forth [one] better than it or similar to it. Do you not know that Allāh is over all things competent? "

What i don't understand is if Allah created the Quran well perfectly first time without any other versions, why did he have adjust some of the verses then?