How to reproduce issue:
1. Select (double-click) an apache server from main node (Inventory->Child Resources)
2. Select (double click) a virtual host (Inventory->Child Resources)
3. Select (double click) on a IfModule and go to Configuration->Current->Add a Allow host (i.e. 192.168.0.1)

The corresponding conf file (i.e. conf.modules.d/00-mpm.conf) of the IfModule (I changed prefork module) is changed in the way, that the apache can't be stopped/restarted/started.

Httpd.log contains:
AH00526: Syntax error on line 38 of /root/tests/noe-jon/jws-3.0/httpd/conf.modules.d/00-mpm.conf:

And restart can't be performed. Commenting/removing the line helps. On the line 38 from my try there is:

 31 <IfModule prefork.c>
 32 StartServers       8
 33 MinSpareServers    5
 34 MaxSpareServers   20
 35 ServerLimit      256
 36 MaxRequestWorkers       256
 37 MaxConnectionsPerChild  4000
 38 Allow from 192.168.0.1
 39 </IfModule>
 31 <IfModule prefork.c>
 32 StartServers       8
 33 MinSpareServers    5
 34 MaxSpareServers   20
 35 ServerLimit      256
 36 MaxRequestWorkers       256
 37 MaxConnectionsPerChild  4000
 38 Allow from 192.168.0.1
 39 </IfModule>

Same problem occurs for Deny host.