Negative ID Node values

I imported “Isole” map of Italy using Osm2mssql. I noticed lot of negative nodes value in tWayCreation table. This table has 16.340.183 records, but 10.587.609 has negative node id, so the node is missing is tNode table. How is it possible? The tool didn’t found any error…

any ideas?

Sounds like the tool you are viewing the data with only handles the old 32 bit ID numbers properly. The number of IDs has grown too large for that and the new schema is using 64 bit numbers.