Version 2.4.4
Change if-then-else condition & text placeholder in LaTeX invoice template for output when contract was canceled like so
# replace \ifthenelse{\equal{{last\_cancel\_date}}{}} {Der Vertrag wurde gekündigt zum: {end\_of\_term}.} # by \ifthenelse{\notequal{{canceled\_to}}{}} {Der Vertrag wurde gekündigt zum: {canceled\_to}.}