After migrating from 9.5.3 to 10.0.7, blocking for character set conversion for a specific table

[thenamelessthing]

Version of the plugin: 2.0.4
Version of your GLPI: 10.0.7

Steps to reproduce the issue:

After migrating GLPI from 9.5.3 to 10.0.7

Glpi suffers from widespread slowness. To add a follow-up or submit a post...

In the table:

glpi_plugin_ocsinventoryng_networkports

we see some line with value -1

When we try to convert (php bin/console migration:utf8mb4) this table we got an error because the value "-1" is not accepted.

Can we modify the value to 0 without causing some problems?

If some table are not in utf8mb4, can it be the cause slowness?

Thank you for your help