Cleaning replication tables before snapshot applied to subscriber

Question

We have a snapshot replication setup.

In some cases (like previous replications failed etc), some subscribers get the following error

The ALTER TABLE statement conflicted with the FOREIGN KEY constraint “<FK_constraint>”. The conflict occurred in database “”, table “”, column ‘’. (Source: MSSQLServer, Error number: 547)

I found out that executing following clean up SQL on the subscriber would solve the issue

delete dbo.MSsavedForeignKeys where constraint_name = N'<FK_constraint>'

Or simply, executing the above SQL without any where clause to clean the dbo.MSsavedForeignKeys table and all problems got fixed. But it was getting a problem when the number of subscribers increases.

What I wonder is,

1. Is it safe to add this delete statement (without where clause) to pre-execution scripts to automatize the process?
2. Are there any other replication tables that could cause such problems and could be deleted with pre-execution scripts?