MS VC++ Compiler equivocation

In my project, I trying reload global operator new and delete ([] too). And when I try to compile in first time, I get link error:

Main.obj : error LNK2005: "void * __cdecl operator new(unsigned int)" (??2@YAPAXI@Z) already defined in LIBCMTD.lib(new.obj)

When I try to compile in second time, errors magically disappear! But sometimes return.
How to resolve this problem?

Run-time Library: MTd.

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