Migrate a NodeBB forum with MongoDB to Discourse

importing users
      182 / 182 (100.0%)  [437953 items/min]
adding users to groups...

importing topics...
      132 / 132 (100.0%)  [3567036 items/min]
importing posts...
/home/dev/discourse/script/import_scripts/nodebb/mongo.rb:100:in 'NodeBB::Mongo#post': undefined method '[]' for nil (NoMethodError)

      post["timestamp"] = timestamp_to_date(post["timestamp"])
                                                ^^^^^^^^^^^^^
        from /home/dev/discourse/script/import_scripts/nodebb/mongo.rb:95:in 'block in NodeBB::Mongo#posts'
        from /home/dev/discourse/script/import_scripts/nodebb/mongo.rb:95:in 'Array#map'
        from /home/dev/discourse/script/import_scripts/nodebb/mongo.rb:95:in 'NodeBB::Mongo#posts'
        from script/import_scripts/nodebb/nodebb.rb:413:in 'block in ImportScripts::NodeBB#import_posts'
        from /home/dev/discourse/script/import_scripts/base.rb:943:in 'block in ImportScripts::Base#batches'
        from <internal:kernel>:168:in 'Kernel#loop'
        from /home/dev/discourse/script/import_scripts/base.rb:942:in 'ImportScripts::Base#batches'
        from script/import_scripts/nodebb/nodebb.rb:412:in 'ImportScripts::NodeBB#import_posts'
        from script/import_scripts/nodebb/nodebb.rb:52:in 'ImportScripts::NodeBB#execute'
        from /home/dev/discourse/script/import_scripts/base.rb:47:in 'ImportScripts::Base#perform'
        from script/import_scripts/nodebb/nodebb.rb:568:in '<main>'


Users seems imported correctly according to script output, see above.

Sorry, are you living person or just smart enough AI-assistant?