This element has already been linked.
This error occurs when a single element is linked more then once.
For example, if an element is compiled and linked twice without cloning:
var linker = $compile(template);
linker($scope); //=> ok
linker($scope); //=> multilink error
Linking an element as a clone multiple times is ok:
var linker = $compile(template);
linker($scope, function() { ... }); //=> ok
linker($scope, function() { ... }); //=> ok
However once an element has been linked it can not be re-linked as a clone:
var linker = $compile(template);
linker($scope); //=> ok
linker($scope, function() { ... }); //=> multilink error