Duplicate table name within the sme schema

Good morning,

We use postgresql 7.3.2 under Linux Red Hat 9.0.
We periodically dump and restore our database. I don't know if an error
occured during a dump restore but our DB seems to be corrupted.
Our base contains many pair of table with the same name.

Schema are the same = public.
How is it possible and how can i turn around this problem to have a
healthy DB.

Thank you.

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