Update error message for duplicate project names (#283)

* Update error message

* Update nmcp/src/main/kotlin/nmcp/internal/DefaultNmcpAggregationExtension.kt

Co-authored-by: Adam <897017+aSemy@users.noreply.github.com>

---------

Co-authored-by: Adam <897017+aSemy@users.noreply.github.com>

Author: martinbonnin

nmcp/src/main/kotlin/nmcp/internal/DefaultNmcpAggregationExtension.kt

@@ -67,10 +67,11 @@ internal abstract class DefaultNmcpAggregationExtension(private val project: Pro
                 project.allprojects {
                     check(!allNames.contains(it.name.lowercase())) {
                         """
-                         Nmcp: some projects have the same name: '${it.name}'. This creates issues when resolving the aggregation.
-                         You can usually resolve this error by renaming your projects (including possibly your root project).
+
+                         Nmcp: some projects have the same name: '${it.name}'. If your projects also have the same groupId, this can create issues when resolving the aggregation.
+                         You can usually resolve this error by renaming your projects (including possibly your root project), or setting a distinct `group` in the colliding projects.
                          Or you can disable this check by calling `allowDuplicateProjectNames.set(true)`.
-                         See https://github.com/gradle/gradle/issues/36167 for more details.
+                         See https://github.com/gradle/gradle/issues/847 for more details.
                         """.trimIndent()
                     }
                     allNames.add(it.name.lowercase())