Checking LocalDB version:

sqlcmd -S "(LocalDB)\MSSQLLocalDB" -Q "SELECT @@VERSION"

Removing existing LocalDB instance:

sqllocaldb stop MSSQLLocalDB
sqllocaldb delete MSSQLLocalDB

Creating a new SQL Server 2016 LocalDB instance:

sqllocaldb create "MSSQLLocalDB" 13.0
sqllocaldb start "MSSQLLocalDB"

Listing LocalDB instances:

sqllocaldb info

These commands collectively helped to:

• Identify the existing LocalDB version
• Remove the SQL Server 2019 LocalDB instance
• Create and start a new SQL Server 2016 LocalDB instance
• Verify the new instance
• Correctly modify database tables