diff --git a/components/timeshift-spreadsheet.tsx b/components/timeshift-spreadsheet.tsx
index 813940c..3c136cc 100644
--- a/components/timeshift-spreadsheet.tsx
+++ b/components/timeshift-spreadsheet.tsx
@@ -365,6 +365,19 @@ export function TimeshiftSpreadsheet({ teamId, teamName }: TimeshiftSpreadsheetP
           styles["A23"] = "font-weight: bold;"  // "Pohotovost IT"
         }
 
+        // Validate configuration before initializing
+        if (!data || data.length === 0) {
+          console.error("Data is empty or undefined:", data)
+          isInitializingRef.current = false
+          return
+        }
+        
+        if (!columns || columns.length === 0) {
+          console.error("Columns is empty or undefined:", columns)
+          isInitializingRef.current = false
+          return
+        }
+
         console.log("Initializing jspreadsheet with config:", {
           dataRows: data.length,
           dataCols: data[0]?.length,
@@ -372,9 +385,9 @@ export function TimeshiftSpreadsheet({ teamId, teamName }: TimeshiftSpreadsheetP
           stylesCount: Object.keys(styles).length
         })
 
-        jspreadsheetInstance.current = (jexcelLib as (el: HTMLElement, config: unknown) => unknown)(spreadsheetRef.current, {
-          data: data,
-          columns: columns,
+        const config = {
+          data: data || [],
+          columns: columns || [],
           minDimensions: [data[0]?.length || 8, Math.max(data.length + 3, 10)],
           allowInsertRow: true,
           allowInsertColumn: false,
@@ -384,7 +397,7 @@ export function TimeshiftSpreadsheet({ teamId, teamName }: TimeshiftSpreadsheetP
           tableOverflow: true,
           tableWidth: "100%",
           tableHeight: "500px",
-          style: styles,
+          style: styles || {},
           onchange: (instance: any, cell: HTMLElement, x: number, y: number, value: string) => {
             console.log("onChange triggered:", { x, y, value, isMerging: isMergingRef.current })
             
@@ -501,9 +514,19 @@ export function TimeshiftSpreadsheet({ teamId, teamName }: TimeshiftSpreadsheetP
               })
             }
           }
-        })
+        }
         
-        console.log("jspreadsheet initialized:", !!jspreadsheetInstance.current)
+        console.log("Config validation passed, creating jspreadsheet instance...")
+        
+        try {
+          jspreadsheetInstance.current = (jexcelLib as (el: HTMLElement, config: unknown) => unknown)(spreadsheetRef.current, config)
+          console.log("jspreadsheet initialized:", !!jspreadsheetInstance.current)
+        } catch (error) {
+          console.error("Error initializing jspreadsheet:", error)
+          console.error("Config that caused error:", config)
+          isInitializingRef.current = false
+          return
+        }
         
         // Additional event listener for first row rotation as fallback
         setTimeout(() => {
diff --git a/logs/auto-commit.log b/logs/auto-commit.log
index ab3ea79..0e90643 100644
--- a/logs/auto-commit.log
+++ b/logs/auto-commit.log
@@ -173,3 +173,6 @@
 2025-07-30 11:54:37 +02:00: 🔖 Creating restore point...
 2025-07-30 11:54:53 +02:00: ✅ Restore point created
 2025-07-30 12:24:37 +02:00: 🔖 Creating restore point...
+2025-07-30 12:26:09 +02:00: ✅ Restore point created
+2025-07-30 12:54:37 +02:00: 🔄 Hourly reset: Commit counter reset to 0
+2025-07-30 12:54:37 +02:00: 🔖 Creating restore point...
diff --git a/logs/auto-commit.out.log b/logs/auto-commit.out.log
index 1ade31b..d16704f 100644
--- a/logs/auto-commit.out.log
+++ b/logs/auto-commit.out.log
@@ -169,3 +169,6 @@
 2025-07-30 11:54:37 +02:00: 🔖 Creating restore point...
 2025-07-30 11:54:53 +02:00: ✅ Restore point created
 2025-07-30 12:24:37 +02:00: 🔖 Creating restore point...
+2025-07-30 12:26:09 +02:00: ✅ Restore point created
+2025-07-30 12:54:37 +02:00: 🔄 Hourly reset: Commit counter reset to 0
+2025-07-30 12:54:37 +02:00: 🔖 Creating restore point...