diff --git a/DESCRIPTION b/DESCRIPTION
index 6d3768eed9..5a56820de2 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Type: Package
 Package: admiral
 Title: ADaM in R Asset Library
-Version: 1.1.0.9001
+Version: 1.1.1
 Authors@R: c(
     person("Ben", "Straub", , "ben.x.straub@gsk.com", role = c("aut", "cre")),
     person("Stefan", "Bundfuss", role = "aut"),
diff --git a/NEWS.md b/NEWS.md
index b9e32e79af..48685cf030 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,4 +1,7 @@
-# admiral (development version)
+# admiral 1.1.1
+
+- `derive_extreme_event()` was fixed such that `check_type = "none"` is accepted
+again. (#2462)
 
 # admiral 1.1.0
 
diff --git a/R/derive_extreme_event.R b/R/derive_extreme_event.R
index 3ad51fa94e..9ddf26fc06 100644
--- a/R/derive_extreme_event.R
+++ b/R/derive_extreme_event.R
@@ -440,14 +440,19 @@ derive_extreme_event <- function(dataset = NULL,
           filter_if(event$condition) %>%
           ungroup()
         if (!is.null(event$mode)) {
-          # Check for duplicates
-          signal_duplicate_records(
-            dataset = data_events,
-            by_vars = append(by_vars, event_order),
-            msg = paste("Check duplicates: ", event$dataset_name, " dataset contains duplicate
-                        records with respect to {.var {replace_values_by_names(by_vars)}}"),
-            cnd_type = check_type
-          )
+          if (check_type != "none") {
+            # Check for duplicates
+            signal_duplicate_records(
+              dataset = data_events,
+              by_vars = append(by_vars, event_order),
+              msg = paste(
+                "Check duplicates: ", event$dataset_name,
+                "dataset contains duplicate records with respect to",
+                "{.var {replace_values_by_names(by_vars)}}"
+              ),
+              cnd_type = check_type
+            )
+          }
 
           data_events <- filter_extreme(
             data_events,
@@ -458,14 +463,19 @@ derive_extreme_event <- function(dataset = NULL,
           )
         }
       } else {
-        # Check for duplicates
-        signal_duplicate_records(
-          dataset = data_source,
-          by_vars = append(by_vars, event_order),
-          msg = paste("Check duplicates: ", event$dataset_name, " dataset contains duplicate records
-                      with respect to {.var {replace_values_by_names(by_vars)}}"),
-          cnd_type = check_type
-        )
+        if (check_type != "none") {
+          # Check for duplicates
+          signal_duplicate_records(
+            dataset = data_source,
+            by_vars = append(by_vars, event_order),
+            msg = paste(
+              "Check duplicates: ", event$dataset_name,
+              "dataset contains duplicate records with respect to",
+              "{.var {replace_values_by_names(by_vars)}}"
+            ),
+            cnd_type = check_type
+          )
+        }
 
         data_events <- filter_joined(
           data_source,
@@ -495,15 +505,19 @@ derive_extreme_event <- function(dataset = NULL,
   )
   selected_records <- bind_rows(selected_records_ls)
 
-  # Check for duplicates
-  signal_duplicate_records(
-    dataset = selected_records,
-    by_vars = append(by_vars, order),
-    msg = paste("Check duplicates: the dataset which consists of all records selected
-                for any of the events defined by {.arg events} contains duplicate records
-                with respect to {.var {replace_values_by_names(by_vars)}}"),
-    cnd_type = check_type
-  )
+  if (check_type != "none") {
+    # Check for duplicates
+    signal_duplicate_records(
+      dataset = selected_records,
+      by_vars = append(by_vars, order),
+      msg = paste(
+        "Check duplicates: the dataset which consists of all records selected",
+        "for any of the events defined by {.arg events} contains duplicate records",
+        "with respect to {.var {replace_values_by_names(by_vars)}}"
+      ),
+      cnd_type = check_type
+    )
+  }
 
   ## filter_extreme
   new_obs <- selected_records %>%
diff --git a/tests/testthat/test-derive_extreme_event.R b/tests/testthat/test-derive_extreme_event.R
index 4e286f2e28..3016de8e2d 100644
--- a/tests/testthat/test-derive_extreme_event.R
+++ b/tests/testthat/test-derive_extreme_event.R
@@ -56,7 +56,7 @@ test_that("derive_extreme_event Test 1: `mode` = first", {
     set_values_to = exprs(
       PARAMCD = "WSP"
     ),
-    check_type = "warning"
+    check_type = "none"
   )
 
   expect_dfs_equal(