exit on install if existing

install.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-SCRIPT_VERSION="82"
+SCRIPT_VERSION="83"
 SCRIPT_URL="https://raw.githubusercontent.com/amidaware/tacticalrmm/master/install.sh"
 
 sudo apt install -y curl wget dirmngr gnupg lsb-release ca-certificates
@@ -30,6 +30,11 @@ fi
 
 rm -f $TMP_FILE
 
+if [ -d /rmm/api/tacticalrmm ]; then
+  echo -ne "${RED}ERROR: Existing trmm installation found. The install script must be run on a clean server.${NC}\n"
+  exit 1
+fi
+
 arch=$(uname -m)
 if [[ "$arch" != "x86_64" ]] && [[ "$arch" != "aarch64" ]]; then
   echo -ne "${RED}ERROR: Only x86_64 and aarch64 is supported, not ${arch}${NC}\n"