Honecker 's plan eventually fell through due to lack of funding .
The SM - 70 continued to be removed as per the agreement , being replaced with extra buried PMN mines , which remained in place until the fall of East Germany in 1989 .
Honecker 's plan eventually fell through due to lack of funding , but the SM - 70 continued to be removed as per the agreement , being replaced with extra buried PMN mines , which remained in place until the fall of East Germany in 1989 .