Duplicate id="fd" detected on the same page

Hi there,
Joomla v3.4.8, EasyBlog v5.0.31
got following errors on our live site, see the link in site access part, through https://validator.w3.org

Warning: The first occurrence of ID fd was here.
From line 20, column 2617; to line 20, column 2697
t-content><div id=fd class="eb eb-vintage eb-view-latest eb-layout-default eb-responsive"><div c

Error: Duplicate ID fd.
From line 31, column 2496; to line 31, column 2586
e-content><div id=fd class="eb eb-mod mod_easyblogmostpopularpost ct-module-theme2 visible-desktop"><div c

Error: Duplicate ID fd.
From line 37, column 1107; to line 37, column 1208
e-content><div id=fd class="eb eb-mod st-1 eb-responsive mod-easyblogshowcase ct-module-theme2 visible-desktop"><div c

Normally we should get only one occurrence of the same ID.

We've found that the same one is defined in :
modules/mod_easyblogmostpopularpost/tmpl/default.php
modules/mod_easyblogshowcase/tmpl/default.php

How can we fix it ?

Cheers,
Lionel