How can I resave old figures?

hi everyone, I have an old figure saved in MyFigure.fig format. Now I want to edit/add/remove something from this. So I open the figure in matlab

fig1=openfig('MyFigure.fig');

Then I do my edits and now I want to save it. I have no problem printing the figure, for example

print('-djpeg100', '-r100', ['MyFigure_edited']);

prints the figure and saves as jpeg. But I want to save it as MyFigure_edited'.fig If I click "save" button on top, it gives me a dialog box with the following message: "Object must have an ancestor of type 'figure'". When I give the following

saveas(fig1,['MyFigure_edited''], 'fig')

I get the following

Error using getProxyValueFromHandle (line 23)
Object must have an ancestor of type 'figure'.

Error in plotedit (line 91)
                [varargout{1:nargout}] = feval(args{:});

Error in specgraph.barseries/preserialize (line 10)
peerVals = plotedit({'getProxyValueFromHandle',hPeers});

Error in hgsaveStructDbl (line 80)
        olddata{i} = {hh,preserialize(hh)};

Error in hgsave (line 58)
    FF.Format2Data = hgsaveStructDbl(h, SaveAll);

Error in saveasfig (line 7)
hgsave( h, name );

Error in saveas (line 126)
    feval( ['saveas' format], h, name )

I do not have the data to replot the figures and there are at least 10 figures with the font sizes or colors that need to be changed. Which I can do but cannot save the edited version of figure. thanks