If you type lower case letters in the Schema User Name field, the Upgrade Assistant converts the name to upper case as per https://docs.oracle.com/middleware/1213/core/UAREF/ua_screens.htm#UAREF1050
If you type lower case letters in the Schema User Name field, the Upgrade Assistant converts the name to upper case as per https://docs.oracle.com/middleware/1213/core/UAREF/ua_screens.htm#UAREF1050

yadavnikhil/biemond-orawls,rmestrum/biemond-orawls,alexjfisher/biemond-orawls,cmbrehm/biemond-orawls,BasLangenberg/biemond-orawls,yadavnikhil/biemond-orawls,BasLangenberg/biemond-orawls,hajee/biemond-orawls,theonejdub/biemond-orawls,alexjfisher/biemond-orawls,rlhatcher/biemond-orawls,biemond/biemond-orawls,robh007/biemond-orawls,bradmcnaughton/biemond-orawls,BasLangenberg/biemond-orawls,hajee/biemond-orawls,rlhatcher/biemond-orawls,cmbrehm/biemond-orawls,BasLangenberg/biemond-orawls,hajee/biemond-orawls,CDLSoftware/biemond-orawls,rmestrum/biemond-orawls,yadavnikhil/biemond-orawls,rmestrum/biemond-orawls,alexjfisher/biemond-orawls,biemond/biemond-orawls,rlhatcher/biemond-orawls,biemond/biemond-orawls,bradmcnaughton/biemond-orawls,biemond/biemond-orawls,theonejdub/biemond-orawls,bradmcnaughton/biemond-orawls,robh007/biemond-orawls,CDLSoftware/biemond-orawls,yadavnikhil/biemond-orawls,robh007/biemond-orawls,rlhatcher/biemond-orawls,cmbrehm/biemond-orawls,rmestrum/biemond-orawls,robh007/biemond-orawls,cmbrehm/biemond-orawls,bradmcnaughton/biemond-orawls,alexjfisher/biemond-orawls,theonejdub/biemond-orawls,theonejdub/biemond-orawls,CDLSoftware/biemond-orawls,CDLSoftware/biemond-orawls,hajee/biemond-orawls