Edit the Tomcat webapps/manager/WEB-INF/web.xml file, change the section like
Updating the <max-file-size> and <max-...
There are files with path of blob store from old geoserver in geoserver/data/gwc/directroy. I have had to delete them. Now finally new geoserver works with replaced workspace. PS don't forget to install different plugins for your geoserver. Thanks for useful comments!