Title

Version 1.6.3 breaks invoice templates created for version 1.6.2

Expected Behavior

templates created for 1.6.2 should work as intended.

Current Behavior

Invoicing PDF templates created for version 1.6.2 throw an error message and don't work in 1.6.3

According to https://www.invoiceplane.com/development IP uses semantic versioning. Following this, the patch number should only increase for non-breaking changes. However, 1.6.3 introduces a new html footer. If this is omitted, an error occurs.

Steps to Reproduce

1. In settings, use a template created for 1.6.2.
2. use it for an invoice.

Screenshots (Optional)

Possible Solution (Optional)

No response

Context (Environment)

No response

Failure Logs (Optional)

No response