[iceberg] branch master updated: Revert "Spec: Mark added_snapshot_id as optional (#8600)" (#8726)

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The following commit(s) were added to refs/heads/master by this push:
     new dd02085b12 Revert "Spec: Mark added_snapshot_id as optional (#8600)" 
(#8726)
dd02085b12 is described below

commit dd02085b12e9b509efef2d9a8b9fe730c0c60b03
Author: Fokko Driesprong <fo...@apache.org>
AuthorDate: Thu Oct 5 22:05:51 2023 +0200

    Revert "Spec: Mark added_snapshot_id as optional (#8600)" (#8726)
    
    This reverts commit f7a7eb2c10cb4a9b6b3ea5bfdfc5d085be8b9c31.
---
 format/spec.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/format/spec.md b/format/spec.md
index 01903393f8..60c0f99c3f 100644
--- a/format/spec.md
+++ b/format/spec.md
@@ -541,7 +541,7 @@ Manifest list files store `manifest_file`, a struct with 
the following fields:
 |            | _required_ | **`517 content`**              | `int` with 
meaning: `0: data`, `1: deletes` | The type of files tracked by the manifest, 
either data or delete files; 0 for all v1 manifests |
 |            | _required_ | **`515 sequence_number`**      | `long`            
                          | The sequence number when the manifest was added to 
the table; use 0 when reading v1 manifest lists |
 |            | _required_ | **`516 min_sequence_number`**  | `long`            
                          | The minimum data sequence number of all live data 
or delete files in the manifest; use 0 when reading v1 manifest lists |
-| _optional_ | _required_ | **`503 added_snapshot_id`**    | `long`            
                          | ID of the snapshot where the  manifest file was 
added |
+| _required_ | _required_ | **`503 added_snapshot_id`**    | `long`            
                          | ID of the snapshot where the  manifest file was 
added |
 | _optional_ | _required_ | **`504 added_files_count`**    | `int`             
                          | Number of entries in the manifest that have status 
`ADDED` (1), when `null` this is assumed to be non-zero |
 | _optional_ | _required_ | **`505 existing_files_count`** | `int`             
                          | Number of entries in the manifest that have status 
`EXISTING` (0), when `null` this is assumed to be non-zero |
 | _optional_ | _required_ | **`506 deleted_files_count`**  | `int`             
                          | Number of entries in the manifest that have status 
`DELETED` (2), when `null` this is assumed to be non-zero |