[Heress]

I created login/register system, I solved all error/warning, but where is one

C:\Users\Nerijus\Desktop\Serveris 0.3.7\gamemodes\pls.pwn( 4998 ) : error 021: symbol already defined: "udb_hash"

4998||stock udb_hash(buf[])
4999||{
5000|| new length=strlen(buf);
5001|| new s1 = 1;
5002|| new s1 = 0;
5003|| new n;
5004|| for (n=0; n<length; n++)
5005|| {
5006|| s1 = (s1 + buf[n]) % 65521;
5007|| s2 = (s2 + s1) % 65521;
5008|| }
5009|| return (s2 << 16) + s1;
5010||}

Please help!