ACE TABLE: Expression ID duplicated in ACE table

What does this mean? I updated to the new version of construct 2 and now I receive this error. I'm trying to recreate pode's iframe plugin with the updated html items such as sandbox. It worked fine before the update. Heres the copy of the error, what does this mean?

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Construct 2 Check failure

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Check failure! This is probably a bug:

ACE table: Expression ID duplicated in ACE table

Condition: exp_ids.find(id) == exp_ids.end()

File: c:\c2\source\exporters\html5\..\..\common\ERAHelpers.h

Line: 249

Function: void __cdecl era::ACETable::AddExpression(int,int,const class std::basic_string<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> > &,const class std::basic_string<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> > &,const class std::basic_string<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> > &,const class std::basic_string<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> > &,void (__cdecl *)(const class era::StaticResult **,int,class era::StaticEvaluation *))

Build: release 104 (64-bit) checked

Component: HTML5 exporter

(Last Win32 error: 0)

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I figured it out, :)

I had two plugins that still had the example data from the sdk templates. It was tripping the warning because there was of course duplicate expressions. I had built a plugin in a while back to get the actual users set video resolution and forgotten to remove the template example data. So when I started the html5 iframe and didn't remove the example data it spit out the warning. So word of caution to all us newbie developers. Make sure you remove the template data and use unique info for each expression, etc.