This problem can arise when a database restored from a backup and the SID of the database owner does not match the owners SID listed in the master database. Here is a solution that uses the "ALTER AUTHORIZATION" statement recommended in the error message:
DECLARE @Command VARCHAR(MAX) = 'ALTER AUTHORIZATION ON DATABASE::[<<DatabaseName>>] TO
[<<LoginName>>]'
SELECT @Command = REPLACE(REPLACE(@Command
, '<<DatabaseName>>', SD.Name)
, '<<LoginName>>', SL.Name)
FROM master..sysdatabases SD
JOIN master..syslogins SL ON SD.SID = SL.SID
WHERE SD.Name = DB_NAME()
PRINT @Command
EXEC(@Command)
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