Go to the CA App and redownload the template from there (if the button isn't there on the CA App to redownload it scroll down and on the left side you will see 'Settings', click on it, then set 'Enable Reinstall Default' to 'Yes' and click 'Apply' - after that you should be able to redownload it).   When you redownloaded the template from the CA App be sure to give it a different name than your other container(s) like 'Valheim2' also change the 'ServerFiles' path to something else like