I am doing this analysis for the first time. How concerned should I be about heteroscedasticity in my data? Here's the scatterplot of predicted values vs residuals:
[![scatterplot of predicted values vs residuals][1]][1]
The Breusch-Pagan test is significant at *p*=.03 (χ²=4.682), so below <.05, but not .01.

With regular multiple regression, the result is the first table below, quite nice. If instead I try WLS regression, the values change drastically (table highlighted in yellow), with two predictors ending up with unacceptable collinearity indices:
[![enter image description here][2]][2]

Here is the original dataset if it helps: https://docs.google.com/spreadsheets/d/13U7xDK7otj-vBOcx6yTpsguAd-wlFNad/edit?usp=sharing&ouid=113244913961284427801&rtpof=true&sd=true

Thanks a lot in advance!

  [1]: https://i.sstatic.net/EJ0zR.png
  [2]: https://i.sstatic.net/ACNhH.png