error upgrading to 4.4.5

• Failed to run the SQL query.Duplicate column name 'Plan_type'
• Failed to run the SQL query.Table 'msrcar_site.{sql_prefix}listings' doesn't exist
• Failed to run the SQL query.Table 'msrcar_site.{sql_prefix}listings' doesn't exist
• Failed to run the SQL query.Table 'msrcar_site.{sql_prefix}listings' doesn't exist
• Failed to run the SQL query.Table 'msrcar_site.{sql_prefix}listings' doesn't exist
• The MySQL dump has corrupt queries; importing the new language has failed

same error

eh. Why 4.4.5 and not 4.5? What is the difference?

could you support find solution to this it is not so difficult to take all this time we can not upgrade so could yo help