The correct answer to this open question is the following. Although there are no options attached, we can say the following.
The solution I can offer if there is a quarrel between International Associations such as the EU and ASEAN so that economy of every country will not be affected would be diplomacy, negotiation, and compassion for the citizens, that in the end are the ones who really suffer the consequences from the political measures.
The European Union (EU), the Association of Southeast Asian Nations (ASEAN), are big trade associations that have many members and in that sum of its parts rely on their strength to negotiate good deals. But all end up to diplomacy and negotiations to get good deals.
That is why the United States, México, and Canada signed NAFTA in 1992, the North America Free Trade Agreement, in order to secure good deals between the three countries. This year NAFTA turned into USMCA, the United States, México, Canada Agreement, after being revised and debated by the Congresses of each country.