Assistance understanding platform policy

I need help understanding a point mentioned in Facebook's platform terms. In order to be able to actually certify that I comply, I've been trying to get feedback regarding this but it's proven to be tough for some reason.

In Section 5b.Tech Providers

ii.2) You will ensure that Platform Data you maintain on behalf of one Client is maintained separately from that of other Clients;

What does the above mean precisely? We have all our clients' data in the same database, same tables, does this mean that we're incompliant because all their data is stored in the same database?