The ratio decedendi in this case is that the court found the present claim to be barred by the principles of res judicata and issue estoppel because the facts and circumstances underlying this claim were essentially the same as those in a prior proceeding. The court determined that the same set of facts, witnesses, and documents were involved, and the relief sought was fundamentally the same, arising from the same transaction. It held that allowing the claim would constitute an abuse of process, as it would amount to double recovery for the same debt and would undermine the finality of the earlier judgment. Furthermore, the court emphasized that the parties in the current and previous proceedings did not need to be identical for issue estoppel to apply, provided the issues and facts are the same and the earlier judgment was final and on the same matter. The decision also underscored that the party seeking to invoke estoppel must have had the opportunity to raise the issue previously and failed to do so, which further justified the application of the doctrine in preventing the re-litigation of the same matter.