I drove the left lane, right lane, and straddling the center line through both chicanes and got no track warnings, so it looks like it's fixed! I deliberately cut the track in another place to verify track warnings were active.
Thank you so much for fixing this!
You are welcome and thank you for testing and Confirming.

So
@Manfredk2 here is the announced Description from what i have done:
WARNING: long Text ahead.

Just to remember, my Target was, to keep the 7 original AI Pathes in my Version, where the Chicanes are removed, because i didn't wanted to create them all again, what would have been necessary, when i would have made a complete new AIW File, with complete new Waypoints.
In the first Version, i just deleted the Waypoints of the Chicanes and smoothed the Pathes in that Area.
Unfortunately i only let the AI drive for testing, so that i didn't notice that there always was a Cit Track Warning in the 2nd Chicane.
The Reason for the Warning was the missing Waypoints in that Part of the Straight, where the Chicanes are.
So i had to find a Way, to add Waypoints in a Way there, that the AI would drive properly and the human Player doesn't get a Cut Warning anymore.
I don't want to bore you with all what i tried out , that didn't work, so i only write what does work, that probably is not the only working Way to do it, but it works.
To avoid, to get the modified AIW File crashing the DevMode, i used a combined Method, with using some Features from the AIW Editor and also manually Editing, because when you remove Waypoints, by using "delete Waypoints" in the AIW Editor, some Things get adapted automatically, like the Connection of the first Waypoint of the Pit Lane Waypoint Path with the main Track, for Example.
What i did:
I loaded the original AIW File and deleted (AIW Editor) the Waypoints of the Chicanes.
At the first Chicane for Example, i deleted the Waypoints 1011 to 1059, that are 49 and saved Waypoints.
Then i did add a new Waypoint Path in the 2 Gaps on the Straight (Waypoint Editor ->record a Path ->add new generic Path) and saved Waypoints again.
Then i left the Track to the main Menu, reloaded it, took the Index Numbers of the new Waypoints and left the DevMode.
Then i copied the Entries of the new Waypoints and pasted them into a new File, one new File for each Chicane and counted them.
Let's say that i got 44 new Waypoints for the Gap of the 1st Chicane, so i had 49 old and 44 new Waypoints.
Because, as said above, the AIW Editor manages some Things automatically, it is necessary to know the Count of the removed and the new Waypoints, because in the next Step, i only delete the old Waypoints, that are more than the new ones.
In Case of the 1st Chicane it is 49-44=5.
So i loaded the original AIW again and deleted (AIW Editor) the Waypoints 1055 - 1059 (5 Pieces) from the first Chicane, did the same Thing at the 2nd Chicane, saved Waypoints and left the DevMode.
Now, from this last saved AIW, i cutted the Waypoints 1011 - 1055 (for the first Chicane) out of the AIW File and pasted them into a new File too.
(I did use separate Files for the Waypoints that had to be replaced, to get a better Overview).
Now i took only the Waypoint Positions from the new Waypoints, transfered them to the old Waypoints and pasted them back into the AIW File.
After i did that for both Chicanes, i saved the edited AIW, made a
Copy of it and loaded it into the DevMode again.
Now the old Waypoints are moved to the Straight, but because the Corridors are the old ones (calculated in Relation to the Waypoint Position), they look a bit funny now.
So i did "find Corridors", to get them aligned to the new Waypoint Positions, save Waypoints and leave the DevMode.
BUT now, due to executing "find Corridors", all Corridors were affected, also the new Corridor of the PitOut, that is necessary for the new Cut Detection, that we of course want to keep.
So i took the
Copy of the AIW, took only the Sections with the new Waypoints at both Chicanes from the last saved File, where i did make the "find Corridors", pasted that into the
Copy and used that as the new AIW.
I loaded that new AIW and now i "only" had to edit the Corridors and Cut Track at the new Waypoints a little bit and smooth all 7 Pathes in that Areas.
After that i tested it and the AI worked as it should and also the Cut Warnings for the human Player were gone.