GST doubt.

Ajnas (Student) (844 Points)

05 June 2021  
A Ltd issued GST credit note Rs.100000+18% to B Ltd In September 2020 and B Ltd reversed such credit note  itc Rs.100000+18%, then due to non satisfaction of condition of  such discount as per the agreement between A Ltd and B Ltd , A Ltd recovered such discount from B Ltd. And raised GST debit note  by A Ltd. To B Ltd. And B lt claimed such discount input reversed earlier? This treatment is correct? It is as per GST law?